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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.10 $ -->
<refentry xml:id="function.set-time-limit" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>set_time_limit</refname>
<refpurpose>Limits the maximum execution time</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>void</type><methodname>set_time_limit</methodname>
<methodparam><type>int</type><parameter>seconds</parameter></methodparam>
</methodsynopsis>
<para>
Set the number of seconds a script is allowed to run. If this is reached,
the script returns a fatal error. The default limit is 30 seconds or, if
it exists, the <literal>max_execution_time</literal> value defined in the
&php.ini;.
</para>
<para>
When called, <function>set_time_limit</function> restarts the timeout
counter from zero. In other words, if the timeout is the default 30
seconds, and 25 seconds into script execution a call such as
<literal>set_time_limit(20)</literal> is made, the script will run for a
total of 45 seconds before timing out.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>seconds</parameter></term>
<listitem>
<para>
The maximum execution time, in seconds. If set to zero, no time limit
is imposed.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.void;
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<warning>
<para>
This function has no effect when PHP is running in &safemode;. There is
no workaround other than turning off safe mode or changing the time limit
in the &php.ini;.
</para>
</warning>
<note>
<para>
The <function>set_time_limit</function> function and the configuration
directive <link linkend="ini.max-execution-time">max_execution_time</link>
only affect the execution time of the script itself. Any time spent on
activity that happens outside the execution of the script such as system
calls using <function>system</function>, stream operations, database
queries, etc. is not included when determining the maximum time that the
script has been running.
</para>
</note>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><link linkend="ini.max-execution-time">max_execution_time</link></member>
<member><link linkend="ini.max-input-time">max_input_time</link></member>
</simplelist>
</para>
</refsect1>
</refentry>
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