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<h1 class="refname">override_function</h1>
<p class="verinfo">(PECL apd >= 0.2)</p><p class="refpurpose"><span class="refname">override_function</span> — <span class="dc-title">Overrides built-in functions</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.override-function-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>override_function</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$function_name</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$function_args</code></span>
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$function_code</code></span>
)</div>
<p class="para rdfs-comment">
Overrides built-in functions by replacing them in the symbol table.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.override-function-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">function_name</code></em></span>
<dd>
<p class="para">
The function to override.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">function_args</code></em></span>
<dd>
<p class="para">
The function arguments, as a comma separated string.
</p>
<p class="para">
Usually you will want to pass this parameter, as well as the
<em><code class="parameter">function_code</code></em> parameter, as a single quote
delimited string. The reason for using single quoted strings, is to
protect the variable names from parsing, otherwise, if you use double
quotes there will be a need to escape the variable names, e.g.
\<var class="varname"><var class="varname">$your_var</var></var>.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">function_code</code></em></span>
<dd>
<p class="para">
The new code for the function.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.override-function-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.override-function-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-433">
<p><strong>Example #1 <span class="function"><strong>override_function()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />override_function</span><span style="color: #007700">(</span><span style="color: #DD0000">'test'</span><span style="color: #007700">, </span><span style="color: #DD0000">'$a,$b'</span><span style="color: #007700">, </span><span style="color: #DD0000">'echo "DOING TEST"; return $a * $b;'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
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