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<title>Runtime Configuration</title>
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<h2 class="title">Runtime Configuration</h2>
<p class="simpara">
The behaviour of these functions is affected by settings in <var class="filename">php.ini</var>.
</p>
<p class="para">
<table class="doctable table">
<caption><strong>Network Configuration Options</strong></caption>
<thead>
<tr>
<th>Name</th>
<th>Default</th>
<th>Changeable</th>
<th>Changelog</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td><a href="network.configuration.html#ini.define-syslog-variables" class="link">define_syslog_variables</a></td>
<td>"0"</td>
<td>PHP_INI_ALL</td>
<td>Deprecated in PHP 5.3.0. Removed in PHP 5.4.0.</td>
</tr>
</tbody>
</table>
For further details and definitions of the
PHP_INI_* modes, see the <a href="configuration.changes.modes.html" class="xref">Where a configuration setting may be set</a>.
</p>
<p class="para">Here's a short explanation of
the configuration directives.</p>
<p class="para">
<dl>
<dt id="ini.define-syslog-variables">
<code class="parameter">define_syslog_variables</code>
<span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span>
</dt>
<dd>
<p class="para">
Whether or not to define the various syslog variables (e.g. $LOG_PID,
$LOG_CRON, etc.). Turning it off is a good idea performance-wise. At
runtime, you can define these variables by calling
<span class="function"><a href="function.define-syslog-variables.html" class="function">define_syslog_variables()</a></span>.
</p>
</dd>
</dl>
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