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.

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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

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