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<title>Sets the value of a configuration option</title>
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</div><hr /><div id="function.ini-set" class="refentry">
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<h1 class="refname">ini_set</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">ini_set</span> — <span class="dc-title">Sets the value of a configuration option</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.ini-set-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>ini_set</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$varname</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$newvalue</code></span>
)</div>
<p class="para rdfs-comment">
Sets the value of the given configuration option. The configuration option
will keep this new value during the script's execution, and will be restored
at the script's ending.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.ini-set-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">varname</code></em></span>
<dd>
<p class="para">
</p>
<p class="para">
Not all the available options can be changed using
<span class="function"><strong>ini_set()</strong></span>. There is a list of all available options
in the <a href="ini.list.html" class="link">appendix</a>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">newvalue</code></em></span>
<dd>
<p class="para">
The new value for the option.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.ini-set-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the old value on success, <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.ini-set-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-503">
<p><strong>Example #1 Setting an ini option</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">ini_get</span><span style="color: #007700">(</span><span style="color: #DD0000">'display_errors'</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">ini_get</span><span style="color: #007700">(</span><span style="color: #DD0000">'display_errors'</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">ini_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'display_errors'</span><span style="color: #007700">, </span><span style="color: #DD0000">'1'</span><span style="color: #007700">);<br />}<br /><br />echo </span><span style="color: #0000BB">ini_get</span><span style="color: #007700">(</span><span style="color: #DD0000">'display_errors'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.ini-set-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.get-cfg-var.html" class="function" rel="rdfs-seeAlso">get_cfg_var()</a> - Gets the value of a PHP configuration option</span></li>
<li class="member"> <span class="function"><a href="function.ini-get.html" class="function" rel="rdfs-seeAlso">ini_get()</a> - Gets the value of a configuration option</span></li>
<li class="member"> <span class="function"><a href="function.ini-get-all.html" class="function" rel="rdfs-seeAlso">ini_get_all()</a> - Gets all configuration options</span></li>
<li class="member"> <span class="function"><a href="function.ini-restore.html" class="function" rel="rdfs-seeAlso">ini_restore()</a> - Restores the value of a configuration option</span></li>
<li class="member">
<a href="configuration.changes.html" class="link">How to change configuration settings</a>
</li>
</ul>
</p>
</div>
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