3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array( 1, 2, 3, 4, 5 ); foreach (&$a as &$k) { echo $k . PHP_EOL; } echo $k . PHP_EOL;
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, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.29, 7.0.0 - 7.0.14, 7.1.0
Parse error: syntax error, unexpected '&' in /in/pXu9J on line 7
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/pXu9J on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/pXu9J on line 7
Process exited with code 255.
preferences:
267.25 ms | 1395 KiB | 219 Q