Online PHP editor | refs for DndhE

<?php $foo = array(); function slow($foo) { // Slower if (isset($foo) && is_array($foo)) { return true; } } function fast($foo) { // Faster if (isset($foo)) { if (is_array($foo)) { return true; } } } function benchmark($callback, $times) { echo "Testing $callback - Valid\n"; $s = microtime(true); for ($i = 0; $i < $times; $i++) { $callback(array(1, 2, 3)); } $e = microtime(true); echo "Completed in " . ($e - $s) . " Seconds\n"; echo "Testing $callback - Invalid\n"; $s = microtime(true); for ($i = 0; $i < $times; $i++) { $callback("string"); } $e = microtime(true); echo "Completed in " . ($e - $s) . " Seconds\n"; echo "Testing $callback - null\n"; $s = microtime(true); for ($i = 0; $i < $times; $i++) { $callback(null); } $e = microtime(true); echo "Completed in " . ($e - $s) . " Seconds\n"; } benchmark("slow", 1000); benchmark("fast", 1000);