3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [[1]=>[[100]], [2]=>[[200]]]; $ref = &$arr[1]; $ref[] = [101]; var_dump($arr);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Warning: Illegal offset type in /in/VE69O on line 3 Warning: Illegal offset type in /in/VE69O on line 3 array(1) { [1]=> &array(1) { [0]=> array(1) { [0]=> int(101) } } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28
Parse error: syntax error, unexpected '[' in /in/VE69O on line 3
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/VE69O on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/VE69O on line 3
Process exited with code 255.
preferences:
248.09 ms | 1395 KiB | 199 Q