(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.
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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Note that array_unique() take into account
value's type. This is usually of no matter, except when it
comes to compare numbers, which can be of several types.
This may lead to confusing results.
Example 2. array_unique() and types
$input = array (4,"3",3,"4",4,4);
$result = array_unique ($input);
print_r($result);
// this will output :
//Array
//(
// [0] => 3
// [1] => 3
// [2] => 4
// [3] => 4
//)
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