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<?php $arr = [ "0" => [ "UserID" => "1", "EmailAddress" => "user5@gmail.com", "TransID" => "fjhf8f7848", "email" => "asdashdk@gmail.com" ], "1" => [ "UserID" => "1", "EmailAddress" => "johndoe@gmail.com", "TransID" => "dfsdhsdu78", "email" => "rrrrrrr@gmail.com" ], ]; foreach($arr as &$item){ uksort($item, function ($a, $b) { $a = strtolower($a); $b = strtolower($b); return strcmp($a, $b); }); } print_r($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 - 8.3.7
Array ( [0] => Array ( [email] => asdashdk@gmail.com [EmailAddress] => user5@gmail.com [TransID] => fjhf8f7848 [UserID] => 1 ) [1] => Array ( [email] => rrrrrrr@gmail.com [EmailAddress] => johndoe@gmail.com [TransID] => dfsdhsdu78 [UserID] => 1 ) )

preferences:
127.98 ms | 404 KiB | 219 Q