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The way PHP deletes the same elements in an array is to pass the array as a parameter to the array_unique function, such as [array_unique(array)]. The array_unique function removes duplicate values from an array and returns the filtered array.
The operating environment of this article: windows10 system, php 7.3, thinkpad t480 computer.
There may be duplicate values in an array, so what should we do if we need to delete duplicate values in the array?
We can directly use the array_unique function in php, which can directly remove duplicate values in the array and return the filtered array. If two or more array values are the same, only the first value is retained and the other values are removed.
Grammar:
array_unique(array)
Code example:
<!DOCTYPE html>
<html>
<body>
<?php
$a=array("a"=>"red","b"=>"green","c"=>"red");
print_r(array_unique($a));
?>
</body>
</html> Running result:
Array ( [a] => red [b] => green )
Related video tutorial: php video tutorial
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