Removes duplicate values from an array
Syntax
array_unique ( array $array [, int $sort_flags = SORT_STRING ] ) : array
Parameters
array
The input array.
sort_flags
The optional second parameter sort_flags may be used to modify the sorting behavior using these values:
| SORT_REGULAR | compare items normally (don't change types) |
| SORT_NUMERIC | compare items numerically |
| SORT_STRING | compare items as strings |
| SORT_LOCALE_STRING | compare items as strings, based on the current locale |
Return
Returns the filtered array.
Examples
1 · array
<?
$array = array("a" => "green", "red", "b" => "green", "blue", "red", "4", 4, "3", 3);
$return = array_unique($array);
print_r($return);
?>Array
(
[a] => green
[0] => red
[1] => blue
[3] => 4
[5] => 3
)
2 · flags · SORT_REGULAR
<?
$array = array("a" => "green", "red", "b" => "green", "blue", "red", "4", 4, "3", 3);
$flags = SORT_REGULAR;
$return = array_unique($array, $flags);
print_r($return);
?>Array
(
[a] => green
[0] => red
[1] => blue
[3] => 4
[5] => 3
)
3 · flags · SORT_NUMERIC
<?
$array = array("a" => "green", "red", "b" => "green", "blue", "red", "4", 4, "3", 3);
$flags = SORT_NUMERIC;
$return = array_unique($array, $flags);
print_r($return);
?>Array
(
[a] => green
[3] => 4
[5] => 3
)
4 · flags · SORT_STRING
<?
$array = array("a" => "green", "red", "b" => "green", "blue", "red", "4", 4, "3", 3);
$flags = SORT_STRING;
$return = array_unique($array, $flags);
print_r($return);
?>Array
(
[a] => green
[0] => red
[1] => blue
[3] => 4
[5] => 3
)
5 · flags · SORT_LOCALE_STRING
<?
$category = LC_ALL;
$locale = "en_US";
setlocale($category, $locale);
$array = array("a" => "green", "red", "b" => "green", "blue", "red", "4", 4, "3", 3);
$flags = SORT_LOCALE_STRING;
$return = array_unique($array, $flags);
print_r($return);
?>Array
(
[a] => green
[0] => red
[1] => blue
[3] => 4
[5] => 3
)
