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Rewrote the docs; it is now mixed; closed bug #20292.

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@102826 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Philip Olson 2002-11-06 22:10:40 +00:00
parent 6e83b9d812
commit 1c2873d603
1 changed files with 22 additions and 20 deletions
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42
reference/http/functions/headers-sent.xml
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@ -1,39 +1,41 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<!-- $Revision: 1.8 $ -->
<!-- splitted from ./en/functions/http.xml, last change in rev 1.7 -->
<refentry id="function.headers-sent">
<refnamediv>
<refname>headers_sent</refname>
<refpurpose>Returns &true; if headers have been sent</refpurpose>
<refpurpose>Checks if or where headers have been sent</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>bool</type><methodname>headers_sent</methodname>
<methodparam><type>string</type><parameter>&amp;file</parameter></methodparam>
<type>mixed</type><methodname>headers_sent</methodname>
<methodparam choice="opt"><type>string</type><parameter>&amp;file</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>&amp;line</parameter></methodparam>
</methodsynopsis>
<para>
This function returns &true; if the HTTP headers have already been
sent, &false; otherwise. You can't add any more header lines using
the <function>header</function> function once the header block has
already been sent. Using this function you can at least prevent
getting the "Duplicate headers ..." error messages.
</para>
<para>
The function will return the php source file and line number where
output started in the optional <parameter>file</parameter> and
<parameter>line</parameter> parameters if these are given.
</para>
<simpara>
<function>headers_sent</function> will return &true; if no HTTP headers
have already been sent or &false; otherwise. If the optional
<parameter>file</parameter> and <parameter>line</parameter> parameters
are set, <function>headers_sent</function> will return the php source
file and line number where output started in the <parameter>file</parameter>.
</simpara>
<simpara>
You can't add any more header lines using the <function>header</function>
function once the header block has already been sent. Using this function
you can at least prevent getting the "Duplicate headers ..." error messages.
Another option is to use <link linkend="ref.outcontrol">Output Buffering</link>.
</simpara>
<note>
<title>New parameters</title>
<simpara>
<parameter>file</parameter> and <parameter>line</parameter> where
added for PHP 4.3.0.
The optional <parameter>file</parameter> and <parameter>line</parameter>
parameters where added in PHP 4.3.0.
</simpara>
</note>
<para>
See also <function>header</function> for a more detailed discussion
of the matters involved.
See also <function>ob_start</function> and <function>header</function> for a
more detailed discussion of the matters involved.
</para>
</refsect1>
</refentry>