3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo 1 <=> 1; // 0 echo 1 <=> 2; // -1 echo 2 <=> 1; // 1 $array = [3,2,1]; usort($array, function($x, $y) { return $x <=> $y; }); var_dump($array);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
0-11array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected '>' in /in/J5JvR on line 3
Process exited with code 255.
preferences:
174.39 ms | 402 KiB | 184 Q