<?php
$arr = array('a' => 1, 'b' => 2);
foreach($arr as &$k=>$v) $k = strtoupper($k);
var_dump($arr);
- Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.32
- Fatal error: Key element cannot be a reference in /in/nWRBa on line 4
Process exited with code 255. - Output for 4.4.2 - 4.4.9
- Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/nWRBa 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 '$' in /in/nWRBa on line 4
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/nWRBa on line 4
Process exited with code 255.
preferences:
219.42 ms | 1395 KiB | 123 Q