What is the method to remove duplicate values ​​from an array in php

The way PHP removes duplicate values ​​from an array is to use the array_unique function to remove duplicate values, such as [array_unique($a)]. This function removes duplicate values ​​from an array and returns the filtered array.

array_unique() function is used to remove duplicate values ​​from an array. If two or more array values ​​are the same, only the first value is retained, the other values ​​are removed, and the filtered array is returned.

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Grammar:

array_unique(array)

Example:

<?php
$a=array("a"=>"red","b"=>"green","c"=>"red");
print_r(array_unique($a));
?>

Running results :

Array ( [a] => red [b] => green )

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