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<title>Restores the previous error handler function</title>
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<h1 class="refname">restore_error_handler</h1>
<p class="verinfo">(PHP 4 >= 4.0.1, PHP 5)</p><p class="refpurpose"><span class="refname">restore_error_handler</span> — <span class="dc-title">Restores the previous error handler function</span></p>
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<div class="refsect1 description" id="refsect1-function.restore-error-handler-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>restore_error_handler</strong></span>
( <span class="methodparam">void</span>
)</div>
<p class="para rdfs-comment">
Used after changing the error handler function using
<span class="function"><a href="function.set-error-handler.html" class="function">set_error_handler()</a></span>, to revert to the previous error
handler (which could be the built-in or a user defined function).
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.restore-error-handler-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
This function always returns <strong><code>TRUE</code></strong>.
</p>
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<div class="refsect1 examples" id="refsect1-function.restore-error-handler-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-454">
<p><strong>Example #1 <span class="function"><strong>restore_error_handler()</strong></span> example</strong></p>
<div class="example-contents"><p>
Decide if <span class="function"><a href="function.unserialize.html" class="function">unserialize()</a></span> caused an error, then
restore the original error handler.
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">unserialize_handler</span><span style="color: #007700">(</span><span style="color: #0000BB">$errno</span><span style="color: #007700">, </span><span style="color: #0000BB">$errstr</span><span style="color: #007700">)<br />{<br /> echo </span><span style="color: #DD0000">"Invalid serialized value.\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">$serialized </span><span style="color: #007700">= </span><span style="color: #DD0000">'foo'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">set_error_handler</span><span style="color: #007700">(</span><span style="color: #DD0000">'unserialize_handler'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$original </span><span style="color: #007700">= </span><span style="color: #0000BB">unserialize</span><span style="color: #007700">(</span><span style="color: #0000BB">$serialized</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">restore_error_handler</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
<div class="example-contents"><p>The above example will output:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
Invalid serialized value.
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.restore-error-handler-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.error-reporting.html" class="function" rel="rdfs-seeAlso">error_reporting()</a> - Sets which PHP errors are reported</span></li>
<li class="member"> <span class="function"><a href="function.set-error-handler.html" class="function" rel="rdfs-seeAlso">set_error_handler()</a> - Sets a user-defined error handler function</span></li>
<li class="member"> <span class="function"><a href="function.restore-exception-handler.html" class="function" rel="rdfs-seeAlso">restore_exception_handler()</a> - Restores the previously defined exception handler function</span></li>
<li class="member"> <span class="function"><a href="function.trigger-error.html" class="function" rel="rdfs-seeAlso">trigger_error()</a> - Generates a user-level error/warning/notice message</span></li>
</ul>
</p>
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