Possible Duplicate:
How to remove duplicate values from an array in PHP
How can I remove all multiple values for example 55,55 will only be 55 using PHP
Example 1
Array
(
[0] => 9
[1] => 2
[2] => 55
[3] => 55
[4] => 9
)
Example 1 should look like example 2 below.
Array
(
[0] => 9
[1] => 2
[2] => 55
)
Use array_unique:
$a2 = array_unique($a);