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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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