/* How many times the code under test should run in each function */
define('LOOP', 100000);
define('MAX', 10);
 
function f1() 
{
    for ($i = 0; $i < LOOP; ++$i) {
        // one liner array_map with anonymous function - 5.3+
        $array = array_map(function($d) { return 'count_' . $d; }, range(0, MAX));
    }
}
function f2()
{
    for ($i = 0; $i < LOOP; ++$i) {
        // another (convoluted) one line approach, avoiding array_map - 5.2+
        $array = explode('#', 'count_' . implode('#count_', range(0, MAX)));
    }
}
$start = microtime(true);
f1();
$stop = microtime(true);
$time1 = $stop - $start;
 
$start = microtime(true);
f2();
$stop = microtime(true);
$time2 = $stop - $start;
 
echo $time1 . "\t";
echo $time2 . "\n";