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653 lines
22 KiB
XML
653 lines
22 KiB
XML
<!-- D O N O T E D I T T H I S F I L E ! ! !
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it is still here for historical reasons only
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(as translators may need to check old revision diffs)
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if you want to change things documented in this file
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you should now edit the files found under en/reference
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instead -->
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<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.36 $ -->
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<reference id="ref.curl">
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<title>CURL, Client URL Library Functions</title>
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<titleabbrev>CURL</titleabbrev>
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<partintro id="curl.partintro">
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<para>
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PHP supports libcurl, a library created by Daniel Stenberg, that
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allows you to connect and communicate to many different types of
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servers with many different types of protocols. libcurl currently
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supports the http, https, ftp, gopher, telnet, dict, file, and
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ldap protocols. libcurl also supports HTTPS certificates, HTTP
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POST, HTTP PUT, FTP uploading (this can also be done with PHP's
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ftp extension), HTTP form based upload, proxies, cookies, and
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user+password authentication.
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</para>
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<para>
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In order to use the CURL functions you need to install the <ulink
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url="&url.curl;">CURL</ulink> package. PHP requires that you use
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CURL 7.0.2-beta or higher. PHP will not work with any version of
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CURL below version 7.0.2-beta.
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</para>
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<para>
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To use PHP's CURL support you must also compile PHP <option
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role="configure">--with-curl[=DIR]</option> where DIR is the
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location of the directory containing the lib and include
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directories. In the "include" directory there should be a folder
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named "curl" which should contain the easy.h and curl.h files.
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There should be a file named "libcurl.a" located in the "lib"
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directory.
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</para>
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<para>
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These functions have been added in PHP 4.0.2.
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</para>
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<para>
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Once you've compiled PHP with CURL support, you can begin using
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the curl functions. The basic idea behind the CURL functions is
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that you initialize a CURL session using the
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<function>curl_init</function>, then you can set all your
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options for the transfer via the <function>curl_exec</function>
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and then you finish off your session using the
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<function>curl_close</function>. Here is an example that uses
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the CURL functions to fetch the PHP homepage into a file:
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<example>
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<title>Using PHP's CURL module to fetch the PHP homepage</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$ch = curl_init ("http://www.example.com/");
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$fp = fopen ("example_homepage.txt", "w");
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curl_setopt ($ch, CURLOPT_FILE, $fp);
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curl_setopt ($ch, CURLOPT_HEADER, 0);
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curl_exec ($ch);
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curl_close ($ch);
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fclose ($fp);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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</partintro>
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<refentry id="function.curl-init">
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<refnamediv>
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<refname>curl_init</refname>
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<refpurpose>Initialize a CURL session</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>int</type><methodname>curl_init</methodname>
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<methodparam choice="opt"><type>string</type><parameter>url</parameter></methodparam>
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</methodsynopsis>
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<para>
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The <function>curl_init</function> will initialize a new session
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and return a CURL handle for use with the
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<function>curl_setopt</function>, <function>curl_exec</function>,
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and <function>curl_close</function> functions. If the optional
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<parameter>url</parameter> parameter is supplied then the
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CURLOPT_URL option will be set to the value of the parameter.
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You can manually set this using the
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<function>curl_setopt</function> function.
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<example>
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<title>
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Initializing a new CURL session and fetching a webpage
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</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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$ch = curl_init();
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curl_setopt ($ch, CURLOPT_URL, "http://www.example.com/");
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curl_setopt ($ch, CURLOPT_HEADER, 0);
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curl_exec ($ch);
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curl_close ($ch);
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?>
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]]>
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</programlisting>
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</example>
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</para>
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<para>
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See also: <function>curl_close</function>,
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<function>curl_setopt</function>
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</para>
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</refsect1>
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</refentry>
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<refentry id="function.curl-setopt">
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<refnamediv>
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<refname>curl_setopt</refname>
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<refpurpose>Set an option for a CURL transfer</refpurpose>
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</refnamediv>
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<refsect1>
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<title>Description</title>
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<methodsynopsis>
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<type>bool</type><methodname>curl_setopt</methodname>
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<methodparam><type>int</type><parameter>ch</parameter></methodparam>
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<methodparam><type>string</type><parameter>option</parameter></methodparam>
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<methodparam><type>mixed</type><parameter>value</parameter></methodparam>
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</methodsynopsis>
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<para>
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The <function>curl_setopt</function> function will set options
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for a CURL session identified by the <parameter>ch</parameter>
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parameter. The <parameter>option</parameter> parameter is the
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option you want to set, and the <parameter>value</parameter> is
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the value of the option given by the
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<parameter>option</parameter>.
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</para>
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<para>
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The <parameter>value</parameter> should be a long for the
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following options (specified in the <parameter>option</parameter>
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parameter):
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<itemizedlist>
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<listitem>
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<simpara>
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<parameter>CURLOPT_INFILESIZE</parameter>: When you are
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uploading a file to a remote site, this option should be used
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to tell PHP what the expected size of the infile will be.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_VERBOSE</parameter>: Set this option to a
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non-zero value if you want CURL to report everything that is
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happening.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_HEADER</parameter>: Set this option to a
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non-zero value if you want the header to be included in the
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output.
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</simpara>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_NOPROGRESS</parameter>: Set this option to
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a non-zero value if you don't want PHP to display a progress
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meter for CURL transfers.
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<note>
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<simpara>
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PHP automatically sets this option to a non-zero parameter,
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this should only be changed for debugging purposes.
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</simpara>
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</note>
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</para>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_NOBODY</parameter>: Set this option to a
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non-zero value if you don't want the body included with the
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output.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_FAILONERROR</parameter>: Set this option to
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a non-zero value if you want PHP to fail silently if the HTTP
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code returned is greater than 300. The default behavior is
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to return the page normally, ignoring the code.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_UPLOAD</parameter>: Set this option to a
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non-zero value if you want PHP to prepare for an upload.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_POST</parameter>: Set this option to a
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non-zero value if you want PHP to do a regular HTTP POST.
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This POST is a normal <literal>application/x-www-form-urlencoded</literal>
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kind, most commonly used by HTML forms.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_FTPLISTONLY</parameter>: Set this option to
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a non-zero value and PHP will just list the names of an FTP
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directory.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_FTPAPPEND</parameter>: Set this option to a
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non-zero value and PHP will append to the remote file instead
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of overwriting it.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_NETRC</parameter>: Set this option to a
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non-zero value and PHP will scan your <filename>~./netrc</filename>
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file to find your username and password for the remote site that
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you're establishing a connection with.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_FOLLOWLOCATION</parameter>: Set this option
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to a non-zero value to follow any "Location: " header that the
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server sends as a part of the HTTP header (note this is
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recursive, PHP will follow as many "Location: " headers that
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it is sent.)
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_PUT</parameter>: Set this option to a non-zero
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value to HTTP PUT a file. The file to PUT must be set with
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the CURLOPT_INFILE and CURLOPT_INFILESIZE.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_MUTE</parameter>: Set this option to a
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non-zero value and PHP will be completely silent with regards
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to the CURL functions.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_TIMEOUT</parameter>: Pass a long as a
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parameter that contains the maximum time, in seconds, that
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you'll allow the CURL functions to take.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_LOW_SPEED_LIMIT</parameter>: Pass a long as
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a parameter that contains the transfer speed in bytes per
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second that the transfer should be below during
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CURLOPT_LOW_SPEED_TIME seconds for PHP to consider it too slow
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and abort.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_LOW_SPEED_TIME</parameter>: Pass a long as
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a parameter that contains the time in seconds that the
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transfer should be below the CURLOPT_LOW_SPEED_LIMIT for PHP
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to consider it too slow and abort.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_RESUME_FROM</parameter>: Pass a long as a
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parameter that contains the offset, in bytes, that you want
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the transfer to start from.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_SSLVERSION</parameter>: Pass a long as a
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parameter that contains the SSL version (2 or 3) to use. By
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default PHP will try and determine this by itself, although,
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in some cases you must set this manually.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_SSL_VERIFYHOST</parameter>: Pass a long if
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CURL should verify the Common name of the peer certificate in the
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SSL handshake. A value of 1 denotes that we should check for the
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existence of the common name, a value of 2 denotes that we should
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make sure it matches the provided hostname.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_TIMECONDITION</parameter>: Pass a long as a
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parameter that defines how the CURLOPT_TIMEVALUE is treated.
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You can set this parameter to TIMECOND_IFMODSINCE or
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TIMECOND_ISUNMODSINCE. This is a HTTP-only feature.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_TIMEVALUE</parameter>: Pass a long as a
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parameter that is the time in seconds since January 1st, 1970.
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The time will be used as specified by the CURLOPT_TIMEVALUE
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option, or by default the TIMECOND_IFMODSINCE will be used.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_RETURNTRANSFER</parameter>: Pass a non-zero
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value if you want CURL to directly return the transfer instead
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of printing it out directly.
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</simpara>
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</listitem>
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</itemizedlist>
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</para>
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<para>
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The <parameter>value</parameter> parameter should be a string for
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the following values of the <parameter>option</parameter>
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parameter:
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<itemizedlist>
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<listitem>
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<simpara>
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<parameter>CURLOPT_URL</parameter>: This is the URL that you
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want PHP to fetch. You can also set this option when
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initializing a session with the <function>curl_init</function>
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function.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_USERPWD</parameter>: Pass a string
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formatted in the [username]:[password] manner, for PHP to use
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for the connection.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_PROXYUSERPWD</parameter>: Pass a string
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formatted in the [username]:[password] format for connection
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to the HTTP proxy.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_RANGE</parameter>: Pass the specified range
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you want. It should be in the "X-Y" format, where X or Y may
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be left out. The HTTP transfers also support several
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intervals, separated with commas as in X-Y,N-M.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_POSTFIELDS</parameter>: Pass a string
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containing the full data to post in an HTTP "POST" operation.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_REFERER</parameter>: Pass a string
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containing the "referer" header to be used in an HTTP request.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_USERAGENT</parameter>: Pass a string
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containing the "user-agent" header to be used in an HTTP
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request.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_FTPPORT</parameter>: Pass a string
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containing the value which will be used to get the IP address to use
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for the ftp "POST" instruction. The POST instruction tells
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the remote server to connect to our specified IP address. The
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string may be a plain IP address, a hostname, a network
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interface name (under UNIX), or just a plain '-' to use the
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systems default IP address.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_COOKIE</parameter>: Pass a string
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containing the content of the cookie to be set in the HTTP
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header.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_SSLCERT</parameter>: Pass a string
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containing the filename of PEM formatted certificate.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_SSLCERTPASSWD</parameter>: Pass a string
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containing the password required to use the CURLOPT_SSLCERT
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certificate.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
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<parameter>CURLOPT_COOKIEFILE</parameter>: Pass a string
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containing the name of the file containing the cookie data.
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The cookie file can be in Netscape format, or just plain
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HTTP-style headers dumped into a file.
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</simpara>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_CUSTOMREQUEST</parameter>: Pass a string to
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be used instead of <literal>GET</literal> or
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<literal>HEAD</literal> when doing an HTTP request. This is
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useful for doing <literal>DELETE</literal> or other, more
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obscure, HTTP requests. Valid values are things like
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<literal>GET</literal>, <literal>POST</literal>, and so on;
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i.e. do not enter a whole HTTP request line here. For instance,
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entering 'GET /index.html HTTP/1.0\r\n\r\n' would be incorrect.
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<note>
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<simpara>
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Don't do this without making sure your server supports the
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command first.
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</simpara>
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</note>
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</para>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_PROXY</parameter>: Give the name of the HTTP
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proxy to tunnel requests through.
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</para>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_INTERFACE</parameter>: Pass the name of the
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outgoing network interface to use. This can be an interface name,
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an IP address or a host name.
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</para>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_KRB4LEVEL</parameter>: Pass the KRB4 (Kerberos
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4) security level. Anyone of the following strings (in
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order from least powerful, to most powerful): 'clear', 'safe',
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'confidential', 'private'. If the string does not match one of
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these, then 'private' is used. If you set this to NULL,
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this disables KRB4 security. KRB4 security only works with FTP
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transactions currently.
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</para>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_HTTPHEADER</parameter>: Pass an array of HTTP
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header fields to set.
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</para>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_QUOTE</parameter>: Pass an array of FTP commands
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to perform on the server prior to the FTP request.
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</para>
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</listitem>
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<listitem>
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<para>
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<parameter>CURLOPT_POSTQUOTE</parameter>: Pass an array of FTP
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commands to execute on the server, after the FTP request has been
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performed.
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</para>
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</listitem>
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</itemizedlist>
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</para>
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<para>
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The following options expect a file descriptor that is obtained
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by using the <function>fopen</function> function:
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<itemizedlist>
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<listitem>
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<simpara>
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<parameter>CURLOPT_FILE</parameter>: The file where the output
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of your transfer should be placed, the default is STDOUT.
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</simpara>
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</listitem>
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<listitem>
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<simpara>
|
|
<parameter>CURLOPT_INFILE</parameter>: The file where the
|
|
input of your transfer comes from.
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<parameter>CURLOPT_WRITEHEADER</parameter>: The file to write
|
|
the header part of the output into.
|
|
</simpara>
|
|
</listitem>
|
|
<listitem>
|
|
<simpara>
|
|
<parameter>CURLOPT_STDERR</parameter>: The file to write
|
|
errors to instead of stderr.
|
|
</simpara>
|
|
</listitem>
|
|
</itemizedlist>
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<refentry id="function.curl-exec">
|
|
<refnamediv>
|
|
<refname>curl_exec</refname>
|
|
<refpurpose>Perform a CURL session</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>bool</type><methodname>curl_exec</methodname>
|
|
<methodparam><type>int</type><parameter>ch</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
This function should be called after you initialize a CURL
|
|
session and all the options for the session are set. Its purpose
|
|
is simply to execute the predefined CURL session (given by the
|
|
<parameter>ch</parameter>).
|
|
</para>
|
|
&tip.ob-capture;
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<refentry id="function.curl-close">
|
|
<refnamediv>
|
|
<refname>curl_close</refname>
|
|
<refpurpose>Close a CURL session</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>void</type><methodname>curl_close</methodname>
|
|
<methodparam><type>int</type><parameter>ch</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
This function closes a CURL session and frees all resources.
|
|
The CURL handle, <parameter>ch</parameter>, is also deleted.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<refentry id="function.curl-version">
|
|
<refnamediv>
|
|
<refname>curl_version</refname>
|
|
<refpurpose>Return the current CURL version</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>string</type><methodname>curl_version</methodname>
|
|
<void/>
|
|
</methodsynopsis>
|
|
<para>
|
|
The <function>curl_version</function> function returns a string
|
|
containing the current CURL version.
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<refentry id='function.curl-errno'>
|
|
<refnamediv>
|
|
<refname>curl_errno</refname>
|
|
<refpurpose>Return an integer containing the last error number</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>int</type><methodname>curl_errno</methodname>
|
|
<methodparam><type>int</type><parameter>ch</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
&warn.undocumented.func;
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<refentry id='function.curl-error'>
|
|
<refnamediv>
|
|
<refname>curl_error</refname>
|
|
<refpurpose>
|
|
Return a string containing the last error for the current session
|
|
</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>string</type><methodname>curl_error</methodname>
|
|
<methodparam><type>int</type><parameter>ch</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
&warn.undocumented.func;
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
<refentry id='function.curl-getinfo'>
|
|
<refnamediv>
|
|
<refname>curl_getinfo</refname>
|
|
<refpurpose>
|
|
Get information regarding a specific transfer
|
|
</refpurpose>
|
|
</refnamediv>
|
|
<refsect1>
|
|
<title>Description</title>
|
|
<methodsynopsis>
|
|
<type>string</type><methodname>curl_getinfo</methodname>
|
|
<methodparam><type>int</type><parameter>ch</parameter></methodparam>
|
|
<methodparam><type>int</type><parameter>opt</parameter></methodparam>
|
|
</methodsynopsis>
|
|
<para>
|
|
&warn.undocumented.func;
|
|
</para>
|
|
</refsect1>
|
|
</refentry>
|
|
|
|
</reference>
|
|
|
|
<!-- Keep this comment at the end of the file
|
|
Local variables:
|
|
mode: sgml
|
|
sgml-omittag:t
|
|
sgml-shorttag:t
|
|
sgml-minimize-attributes:nil
|
|
sgml-always-quote-attributes:t
|
|
sgml-indent-step:1
|
|
sgml-indent-data:t
|
|
indent-tabs-mode:nil
|
|
sgml-parent-document:nil
|
|
sgml-default-dtd-file:"../../manual.ced"
|
|
sgml-exposed-tags:nil
|
|
sgml-local-catalogs:nil
|
|
sgml-local-ecat-files:nil
|
|
End:
|
|
vim600: syn=xml fen fdm=syntax fdl=2 si
|
|
vim: et tw=78 syn=sgml
|
|
vi: ts=1 sw=1
|
|
-->
|