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copied!<p><strong>Updated Answer:</strong></p> <p>You can use:</p> <pre><code>call_user_func('more', &$count) </code></pre> <p>to achieve the same effect as:</p> <pre><code>call_user_func_array('more', array(&$count)) </code></pre> <p>For this reason I believe (unfoundedly) that <code>call_user_func</code> is just a compiler time short cut. (i.e. it gets replaced with the later at compile time)</p> <p>To give my view on you actual question "Why was <code>call_user_func</code> designed to work this way?":</p> <p>It probably falls under the same lines as "Why is some methods <code>strstr</code> and other <code>str_replace</code>?, why is array functions <code>haystack, needle</code> and string functions <code>needle, haystack</code>?</p> <p>Its because PHP was designed, by many different people, over a long period of time, and with no strict standards in place at the time.</p> <p><strong>Original Answer:</strong></p> <p>You must make sure you set the variable inside the array to a reference as well.</p> <p>Try this and take note of the <code>array(&$t)</code> part:</p> <pre><code>function test(&$t) { $t++; echo '$t is '.$t.' inside function'.PHP_EOL; } $t = 0; echo '$t is '.$t.' in global scope'.PHP_EOL; test($t); $t++; echo '$t is '.$t.' in global scope'.PHP_EOL; call_user_func_array('test', array(&$t)); $t++; echo '$t is '.$t.' in global scope'.PHP_EOL; </code></pre> <p>Should output:</p> <pre><code>$t is 0 in global scope $t is 1 inside function $t is 2 in global scope $t is 3 inside function $t is 4 in global scope </code></pre>

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