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<?php function func1($haystack, $needle) { $len = strlen($needle); foreach ($haystack as $hay) { if (substr($hay, 0, $len) == $needle) { return true; } } return false; } function func2($haystack, $needle) { foreach ($haystack as $hay) { if (strpos($hay, $needle) === 0) { return true; } } return false; } $c = 10000; $n = 0; $arr = array('Apple', 'Application'); $time1 = microtime(true); while ($n++ < $c) { func1($arr, 'App'); } $time2 = microtime(true); $time3 = microtime(true); while ($n-- > 0) { func2($arr, 'App'); } $time4 = microtime(true); echo 'Original function: ', ($time2-$time1), "\r\n"; echo 'With strpos(): ', ($time4-$time3);
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