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fix bug #40395: document which chars are escaped when running with '/e' modifier

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@229572 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Nuno Lopes 2007-02-11 19:48:34 +00:00
parent bd40a5960a
commit cce3db21a1
1 changed files with 12 additions and 1 deletions
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13
reference/pcre/functions/preg-replace.xml
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@ -1,5 +1,5 @@
<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.22 $ -->
<!-- $Revision: 1.23 $ -->
<refentry id="function.preg-replace">
<refnamediv>
<refname>preg_replace</refname>
@ -83,6 +83,17 @@
<literal>$1</literal> backreference, leaving the <literal>1</literal>
as a literal.
</para>
<para>
When using the <literal>e</literal> modifier, this function escapes
some characters (namely <literal>'</literal>, <literal>"</literal>,
<literal>\</literal> and NULL) in the strings that replace the
backreferences. This is done to ensure that no syntax errors arrise
from backreference usage with either single or double quotes (e.g.
<literal>'strlen(\'$1\')+strlen("$2")'</literal>). Make sure you are
aware of PHP's <link linkend="language.types.string">string
syntax</link> to know exactly how the interpreted string will look
like.
</para>
</listitem>
</varlistentry>
<varlistentry>