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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array1 = array( 'group 1' => array( 'test 1', 'test 2', 'test 3' ) ); $array2 = array( 'group 1' => array( 'test 1', 'test 4' ), 'group 2' => array( 'test2 1', 'test2 2', 'test 4' ) ); $merged = array_merge($array1, $array2); print_r($merged, true);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0