How to remove duplicates from an array in php

The way PHP removes duplicates from an array is to use the array_unique() function, such as [array_unique(array)]. The array_unique function is a function specifically used to remove duplicate values from an array.

The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.

In PHP we can use the array_unique function to remove duplicate items in the array. Let’s introduce this function first.

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

Note: The retained array will retain the key type of the first array item.

Grammar:

array_unique(array)

A small example:

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

Running results:

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

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