3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ [1, 'xxx', 'yyy'], [2, 'xxx', 'yyy'], [3, 'xxx', 'yyy'], [4, 'xxx', 'yyy'], [5, 'xxx', 'yyy'], [6, 'xxx', 'yyy'], [7, 'xxx', 'yyy'], [8, 'xxx', 'yyy'], [9, 'xxx', 'yyy'], [10, 'xxx', 'yyy'], [11, 'xxx', 'yyy'], [12, 'xxx', 'yyy'], [13, 'xxx', 'yyy'], [14, 'xxx', 'yyy'], [15, 'xxx', 'yyy'], [16, 'xxx', 'yyy'], [17, 'xxx', 'yyy'], [18, 'xxx', 'yyy'], [19, 'xxx', 'yyy'] ]; $t = microtime(true); $result = array_map(function($v){ return $v[0]; }, $array); echo number_format(microtime(true) - $t, 3), PHP_EOL; $t = microtime(true); $result = array(); foreach($array as $v)$result[] = $v[0]; echo number_format(microtime(true) - $t, 3), PHP_EOL; ?>
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7
0.000 0.000
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/v5vWN on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/v5vWN on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/v5vWN on line 2
Process exited with code 255.
preferences:
152.39 ms | 401 KiB | 215 Q