3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3,4); foreach($a AS &$y) { $y = $y*2; } unset(&$y); foreach($a AS $y) { echo $y.', '; } echo PHP_EOL, $y , PHP_EOL; foreach($a AS $x) { echo $x.', '; } echo PHP_EOL, $x , PHP_EOL;
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.35
Parse error: syntax error, unexpected '&' in /in/QA29G on line 8
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected '&', expecting T_STRING or T_VARIABLE or '$' in /in/QA29G on line 8
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '&', expecting T_STRING or T_VARIABLE or '$' in /in/QA29G on line 8
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/QA29G on line 4
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
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/QA29G on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/QA29G on line 4
Process exited with code 255.
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221.76 ms | 1395 KiB | 125 Q