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<?php $arr = [ '100001' => 'DUMMY1', '1000' => 'DUMMY', '1001' => 'TEST', '100002' => 'DUMMY3', '100004' => 'DUMMY4', '100102' => 'DUMMY123', '100100' => 'test1' ]; ksort($arr, SORT_STRING); var_export($arr);

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