3v4l.org

run code in 300+ PHP versions simultaneously
<?php $show = array( 'mon' => false, 'tue' => false, 'wed' => false, 'thu' => false, 'fri' => false, 'sat' => false, 'sun' => false ); foreach ($show as $skey => &$sval) { $sval = true; } reset(show); var_dump($show);
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.40, 5.5.24, 5.6.8
Fatal error: Only variables can be passed by reference in /in/ccmZk on line 17
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/ccmZk on line 13
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/ccmZk on line 13
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/ccmZk on line 13
Process exited with code 255.
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122.65 ms | 401 KiB | 130 Q