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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@195295 c90b9560-bf6c-de11-be94-00142212c4b1
108 lines
4.5 KiB
XML
108 lines
4.5 KiB
XML
<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.8 $ -->
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<refentry id="function.oci-pconnect">
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<refnamediv>
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<refname>oci_pconnect</refname>
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<refpurpose>Connect to an Oracle database using a persistent connection</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>resource</type><methodname>oci_pconnect</methodname>
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<methodparam><type>string</type><parameter>username</parameter></methodparam>
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<methodparam><type>string</type><parameter>password</parameter></methodparam>
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<methodparam choice="opt"><type>string</type><parameter>db</parameter></methodparam>
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<methodparam choice="opt"><type>string</type><parameter>charset</parameter></methodparam>
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<methodparam choice="opt"><type>int</type><parameter>session_mode</parameter></methodparam>
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</methodsynopsis>
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<para>
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<function>oci_pconnect</function> creates a persistent connection
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to an Oracle server and logs on. Persistent connections are cached
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and re-used between requests, resulting in reduced overhead on each
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page load; a typical PHP application will have a single persistent
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connection open against an Oracle server per Apache child process
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(or PHP FastCGI/CGI process). See the <link
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linkend="features.persistent-connections">Persistent Database
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Connections</link> section for more information.
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</para>
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<note>
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<simpara>
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Starting with version 1.1 of the oci8 extension, the lifetime and
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maximum amount of persistent Oracle connections can be tuned by setting
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the following configuration values: <link
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linkend="ini.oci8.persistent_timeout">oci8.persistent_timeout</link>,
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<link linkend="ini.oci8.ping_interval">oci8.ping_interval</link> and
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<link linkend="ini.oci8.max_persistent">oci8.max_persistent</link>.
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</simpara>
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</note>
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<para>
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The optional third parameter can either contain
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the name of the local Oracle instance or the name of the entry in
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<filename>tnsnames.ora</filename>. If the third parameter is not specified,
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PHP uses environment variables <literal>ORACLE_SID</literal> and
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<literal>TWO_TASK</literal> to determine the name of local Oracle
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instance and location of <filename>tnsnames.ora</filename> accordingly.
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</para>
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<para>
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Parameter <parameter>session_mode</parameter> is available since version
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1.1 and accepts the following values: <constant>OCI_DEFAULT</constant>,
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<constant>OCI_SYSOPER</constant> and <constant>OCI_SYSDBA</constant>.
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If either <constant>OCI_SYSOPER</constant> or
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<constant>OCI_SYSDBA</constant> were specified,
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<function>oci_connect</function> will try to establish privileged
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connection using external credentials. Privileged connections are
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disabled by default. To enable them you need to set <link
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linkend="ini.oci8.privileged_connect">oci8.privileged_connect</link>
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to On.
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</para>
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<note>
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<simpara>
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If you're using PHP with Oracle Instant Client, you can use easy connect
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naming method described here:
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<ulink url="&url.oracle.oic.connect;">&url.oracle.oic.connect;</ulink>.
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Basically this means you can specify "//db_host[:port]/database_name"
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as database name. But if you want to use the old way of naming you
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<emphasis>must</emphasis> set either <constant>ORACLE_HOME</constant> or
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<constant>TNS_ADMIN</constant>.
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</simpara>
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</note>
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&oci.charset;
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<para>
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<function>oci_pconnect</function> returns connection identifier or
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&false; on error.
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</para>
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<note>
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<para>
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In PHP versions before 5.0.0 you must use <function>ociplogon</function> instead.
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This name still can be used, it was left as alias of
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<function>oci_pconnect</function> for downwards compatability.
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This, however, is deprecated and not recommended.
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</para>
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</note>
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<para>
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See also <function>oci_connect</function> and
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<function>oci_new_connect</function>.
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"../../../../manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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