array_unique
(PHP 4 >= 4.0.1, PHP 5)
array_unique — Removes duplicate values from an array
Description
array array_unique
( array $array
)
Note that keys are preserved. array_unique() sorts
the values treated as string at first, then will keep the first key
encountered for every value, and ignore all following keys. It does not
mean that the key of the first related value from the unsorted
array
will be kept.
Note:
Two elements are considered equal if and only if
(string) $elem1 === (string) $elem2. In words:
when the string representation is the same.
The first element will be used.
Parameters
-
array
-
The input array.
Return Values
Returns the filtered array.
Examples
Example #1 array_unique() example
<?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?>
The above example will output:
Array
(
[a] => green
[0] => red
[1] => blue
)
Example #2 array_unique() and types
<?php
$input = array(4, "4", "3", 4, 3, "3");
$result = array_unique($input);
var_dump($result);
?>
The above example will output:
array(2) {
[0] => int(4)
[2] => string(1) "3"
}
array_uintersect
