in_array strict comparison

in_array_comparison.php

<?php

$bench = function(callable $code, $arg){
	$start = microtime(true);	
	$code($arg);	
	$end = microtime(true) - $start;
	return $end;
};

$needle = 128;
$testArray = ['2', '4', '8', '16', '32', '64'];
$test = function($strict) use ($testArray, $needle){
	for($i = 0; $i < 1 * 1000 * 1000; $i++){
		in_array($needle, $testArray, $strict);
	}
};

var_dump($bench($test, false));
var_dump($bench($test, true));
// float(0.33267593383789) 
// float(0.061913013458252)