How to remove duplicate elements from array in PHP

In PHP, you can use the built-in function "array_unique()" to directly delete duplicate elements, or you can use the "array_flip()" function to indirectly delete duplicate elements.

【Video tutorial recommendation: PHP tutorial】

array_unique() function

array_unique() function can remove duplicate values ​​​​in the array and return the result array; when the values ​​​​of several array elements are equal, only the first element is retained, and the other elements are delete.

Code example:

 "green", "red", "b" => "green", "blue", "red");
var_dump($result1);
$result2 = array_unique($result1);
var_dump($result2);
?>

Output:

##array_flip() function

The above is the detailed content of How to remove duplicate elements from array in PHP. For more information, please follow other related articles on the PHP Chinese website!