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copied!<p>When using <code>call_user_func_array</code>, passing by value when a function expects a reference is considered an error, in newer versions of PHP.</p> <p>This was valid PHP code before PHP 5.3.3:</p> <pre><code>//first param is pass by reference: my_function(&$strName){ } //passing by value, not by reference, is now incorrect if passing by reference is expected: call_user_func_array("my_function", array($strSomething)); //correct usage call_user_func_array("my_function", array(&$strSomething)); </code></pre> <p>The above pass by value is no longer possible without a warning (my project is also set to throw exceptions on any kind of error (notice, warning, etc).) so I had to fix this.</p> <p><strong>Solution</strong> I've hit this problem and this is how I solved it (I have a small RPC server, so there is no such thing as referenced values after deserializing params):</p> <pre><code>//generic utility function for this kind of situations function &array_make_references(&$arrSomething) { $arrAllValuesReferencesToOriginalValues=array(); foreach($arrSomething as $mxKey=>&$mxValue) $arrAllValuesReferencesToOriginalValues[$mxKey]=&$mxValue; return $arrAllValuesReferencesToOriginalValues; } </code></pre> <p>Although <code>$strSomething</code> is not passed by reference, <code>array_make_references</code> will make it a reference to itself:</p> <pre><code>call_user_func_array("my_function", array_make_references(array($strSomething))); </code></pre> <p>I think the PHP guys were thinking of helping people catch incorrectly called functions (a well concealed pitfall), which happens often when going through <code>call_user_func_array</code>.</p>

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