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run code in 200+ php & hhvm versions
Bugs & Features
<?php $arrays = array( 0 => array( 0 => 'one', 1 => 'two', 2 => 'three' ), 1 => array( 0 => 'four', 1 => 'five', 2 => 'six' ), 2 => array( 0 => 'seven', 1 => 'eight', 2 => 'nine' ) ); $result = call_user_func_array('array_merge', $arrays);
Output for 4.3.0 - 7.1.7, 7.2.0
Output for 7.1.10

Process exited with code 137.