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run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = [1=>[[100]], 2=>[[200]]]; $ref = &$arr[1]; $empty = 0; $ref[] = array_merge($empty, [101]); var_dump($arr);
Output for 5.4.0 - 7.1.0
Warning: array_merge(): Argument #1 is not an array in /in/KafKO on line 6 array(2) { [1]=> &array(2) { [0]=> array(1) { [0]=> int(100) } [1]=> NULL } [2]=> array(1) { [0]=> array(1) { [0]=> int(200) } } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/KafKO on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/KafKO on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/KafKO on line 3
Process exited with code 255.