3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ar1 = ['sdasd'=>[2,3,5,7], 'grtgtr'=>[1,2,7,8]]; $ar2 = ['sdasd'=>[2,3], 'grtgtr'=>[1,2]]; foreach($ar1 as $key=>&$subar){ $subar = array_merge($subar,$ar2[$key]); } print_r($ar1);
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Array ( [sdasd] => Array ( [0] => 2 [1] => 3 [2] => 5 [3] => 7 [4] => 2 [5] => 3 ) [grtgtr] => Array ( [0] => 1 [1] => 2 [2] => 7 [3] => 8 [4] => 1 [5] => 2 ) )
preferences:
102.11 ms | 408 KiB | 5 Q