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<?php $substring = "foobar"; $string = str_repeat($substring, 100); $count = 1; $time = microtime(true); for ($i=0; $i < $count; $i++) { echo str_starts_with($string, $substring); } #echo round(microtime(true) - $time, 4); $time = microtime(true); for ($i=0; $i < $count; $i++) { echo preg_match("!^$substring!", $string); } #echo round(microtime(true) - $time, 4);
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