Array_unique () Definition and usage
The Array_unique () function shifts the duplicate values in the array and returns the result arrays.
When the values of several array elements are equal, only the first element is preserved, and the other elements are deleted.
The key name in the returned array is not changed.
Grammar
Array_unique (Array)
Parameter description
Array required. Specifies the input array.
Description
Array_unique () Sorts the values first as a string, then retains only the first key name encountered for each value, and then ignores all subsequent key names. This does not mean that the key name of the first occurrence of the same value in an unordered array is preserved.
Hints and Notes
Note: The returned array will hold the key type of the first array element.
Example
<?php $a =array ("a" and "cat", "b" = "Dog", "C" and "cat"); Print_r (Array_unique ($a));?>
Output:
Array ([A] = Cat [b] = Dog)
