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PODoes the following call to call_user_func_array() work?
 

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  1. PODoes the following call to call_user_func_array() work?
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    <p>I have a couple of libraries that use code similar to the following one.</p> <pre><code>$args = array_merge(array(&amp;$target, $context), $args); $result = call_user_func_array($callback, $args); </code></pre> <p>The code is different in both the cases, but the code I shown is what essentially is done. The <code>$callback</code> function uses the following signature:</p> <pre><code>function callback(&amp;$target, $context); </code></pre> <p>Both the libraries document that, and third-party code (call it plug-in, or extension) adopts that function signature, which means none of the extensions defines the callback as, e.g., <code>function my_extension_loader_callback($target, $context)</code>.</p> <p>What confuses me are the following sentence in the documentation for <a href="http://php.net/manual/en/function.call-user-func-array.php" rel="nofollow">call_user_func_array()</a>.</p> <blockquote> <p>Before PHP 5.4, referenced variables in param_arr are passed to the function by reference, regardless of whether the function expects the respective parameter to be passed by reference. This form of call-time pass by reference does not emit a deprecation notice, but it is nonetheless deprecated, and has been removed in PHP 5.4. <strong>Furthermore, this does not apply to internal functions, for which the function signature is honored.</strong> Passing by value when the function expects a parameter by reference results in a warning and having <code>call_user_func()</code> return <code>FALSE</code>.</p> </blockquote> <p>In particular, the highlighted sentence seems to suggest that is not done for functions define in PHP code.</p> <p>Does using <code>call_user_func_array()</code> in this way work in PHP 5.4?</p>
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