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<?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 - 7.2.33, 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 - 8.3.4, 8.3.6
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 ) )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 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:
181.61 ms | 402 KiB | 182 Q