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<?php $array = array_map('strtolower', array( 1 => '1233', 2 => '12334', 3 => 'Hello', 4 => 'hello', 5 => 'U' )); var_dump( array_unique( $array ) ); var_dump( array_diff_assoc( $array, array_unique( $array ) ) ); var_dump( array_unique( array_diff_assoc( $array, array_unique( $array ) ) ) );
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [1]=> string(4) "1233" [2]=> string(5) "12334" [3]=> string(5) "hello" [5]=> string(1) "u" } array(1) { [4]=> string(5) "hello" } array(1) { [4]=> string(5) "hello" }

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