3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = 0 => Array( Array ( 0 => 1 ) 1 => Array ( 0 => 2 ) ); $result = call_user_func_array("array_merge", $input); var_export($result);
Output for 5.4.0 - 5.4.23
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW) in /in/sqt3L on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_DOUBLE_ARROW in /in/sqt3L on line 2
Process exited with code 255.
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181.01 ms | 1395 KiB | 60 Q