has_duplicated_array : An simple function to check if given array contains duplicated values

has_duplicated_array.php

<?php
/*
* Author : Farhad Hassan Pour (https://farhadhp.github.io/)
*/
function has_duplicated_array($arr) {
	$count_value = array_count_values($arr);
	rsort($count_value);
    return $count_value[0] > 1;
}

/*
* Example
*/


$my_array = array('a','b','c','d','e','b','b','d','c','e','e','e','e');
if(has_duplicated_array($my_array)) {
	echo 'duplicat';
}else{
	echo 'not duplicat!';
}
// output : duplicat

And a bit shorter:

<?php
	
	$arr = [ 1, 2, 3, 3 ];
	
	echo "Array does " . ( hasDuplicates($arr) ? '' : 'not ' ) . "have duplicates.";
	
	/**
	 * Checks if array has duplicate values in it
	 *
	 * @param array $value The array
	 *
	 * @return bool
	 */
	function hasDuplicates($value) {
		return count(array_count_values($value)) != count($value);
	}

?>