<?xml version="1.0" encoding="utf-8"?>
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<section xml:id="pcre.configuration" xmlns="http://docbook.org/ns/docbook">
 &reftitle.runtime;
 &extension.runtime;
 <para>
  <table>
   <title>PCRE Configuration Options</title>
   <tgroup cols="4">
    <thead>
     <row>
      <entry>&Name;</entry>
      <entry>&Default;</entry>
      <entry>&Changeable;</entry>
      <entry>&Changelog;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry><link linkend="ini.pcre.backtrack-limit">pcre.backtrack_limit</link></entry>
      <entry>"1000000"</entry>
      <entry>PHP_INI_ALL</entry>
      <entry>Available since PHP 5.2.0.</entry>
     </row>
     <row>
      <entry><link linkend="ini.pcre.recursion-limit">pcre.recursion_limit</link></entry>
      <entry>"100000"</entry>
      <entry>PHP_INI_ALL</entry>
      <entry>Available since PHP 5.2.0.</entry>
     </row>
    </tbody>
   </tgroup>
  </table>
  &ini.php.constants;
 </para>

 &ini.descriptions.title;

 <para>
  <variablelist>
   <varlistentry xml:id="ini.pcre.backtrack-limit">
    <term>
     <parameter>pcre.backtrack_limit</parameter>
     <type>integer</type>
    </term>
    <listitem>
     <para>
      PCRE's backtracking limit. Defaults to 100000 for PHP &lt; 5.3.7.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="ini.pcre.recursion-limit">
    <term>
     <parameter>pcre.recursion_limit</parameter>
     <type>integer</type>
    </term>
    <listitem>
     <para>
      PCRE's recursion limit. Please note that if you set this value to a high
      number you may consume all the available process stack and eventually
      crash PHP (due to reaching the stack size limit imposed by the Operating
      System).
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </para>

</section>

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