<?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 ) ) ) );
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