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<?php $input = Array( 0 => 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 '1' (T_LNUMBER), expecting ')' in /in/R5KmZ on line 2
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_LNUMBER, expecting ')' in /in/R5KmZ on line 2
Process exited with code 255.

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