(PHP 4 )
array_unique -- Removes duplicate values from an array
Description
array array_unique (array array)
array_unique() takes input
array and returns a new array
without duplicate values.
Note that keys are preserved. array_unique() will
keep the first key encountered for every value, and ignore all
following keys.
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.
| Warning |
This was broken in PHP 4.0.4!
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Example 1. array_unique() example
$input = array ("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique ($input);
print_r($result);
// this will output :
//Array
//(
// [a] => green
// [0] => red
// [1] => blue
//)
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Example 2. array_unique() and types
$input = array (4,"4","3",4,3,"3");
$result = array_unique ($input);
var_dump($result);
/* output:
array(2) {
[0]=>
int(4)
[1]=>
string(1) "3"
}
*/
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