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<?php $ary1 = array( array( 'sn' => '123', 'name' => 'whatever', ), array( 'sn' => '234', 'name' => 'whatever', ), ); $ary2 = array( array( 'sn' => '123', 'gender' => 'male', ), array( 'sn' => '234', 'gender' => 'female', ), ); $res = []; foreach (array_merge($ary1, $ary2) as $a) { $res[$a['sn']] = (count($res[$a['sn']])) ? array_merge($res[$a['sn']], $a) : $a; } var_dump($res);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key 123 in /in/76BuQ on line 27 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/76BuQ:27 Stack trace: #0 {main} thrown in /in/76BuQ on line 27
Process exited with code 255.

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