3v4l.org

run code in 300+ PHP versions simultaneously
<?php function vec_add (&$a, $b) { $a['x'] += $b['x']; $a['y'] += $b['y']; $a['z'] += $b['z']; } $a = array (x => 3, y => 2, z => 5); $b = array (x => 9, y => 3, z => -7); vec_add (&$a, $b); print_r ($a);
Output for 7.0.0 - 7.0.2
Parse error: syntax error, unexpected '&' in /in/n6NJu on line 8
Process exited with code 255.
Output for 5.5.24 - 5.5.31, 5.6.8 - 5.6.17
Fatal error: Call-time pass-by-reference has been removed in /in/n6NJu on line 8
Process exited with code 255.
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169.88 ms | 1395 KiB | 28 Q