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<?php $arr =[['c' => 3], ['a' => 1, 'b' => 2, 'c' => 3], ['c' => 3]]; $new = $arr[0]; foreach($arr as $sub){ $new = array_intersect_key($new, $sub); } foreach($arr as &$sub){ $sub =array_intersect_key($sub, $new); } Var_dump($arr);
Output for 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array(3) { [0]=> array(1) { ["c"]=> int(3) } [1]=> array(1) { ["c"]=> int(3) } [2]=> &array(1) { ["c"]=> int(3) } }
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(3) { [0]=> array(1) { ["c"]=> int(3) } [1]=> array(1) { ["c"]=> int(3) } [2]=> &array(1) { ["c"]=> int(3) } }

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