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<?php $a = array('01'=>1, '02'=>73); $b = array('10'=>11, '11'=>23); var_dump($a,$b); var_dump(array_merge($a,$b));
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(2) { ["01"]=> int(1) ["02"]=> int(73) } array(2) { [10]=> int(11) [11]=> int(23) } array(4) { ["01"]=> int(1) ["02"]=> int(73) [0]=> int(11) [1]=> int(23) }

preferences:
288.31 ms | 406 KiB | 453 Q