How can I check if a value is already in an array?
By prabeen patra
How can I check if a value is already in an array??????
Teacher SiliconIndia replied to prabeen patra Wednesday, March 17, 2010
Hi Prabeen,
If you wish to check whether a value is already stored in an array or not, then use the in_array function.
This is useful when you don't want any duplicates in the array and therefore only want to add a value if it's not already there. The first argument is the string you are testing for and the second is the array you are checking against.
Here is an example of in_array in action:
<?php
$values = array("banana","apple","pear","banana");
$newvalue = "pear";
if (in_array($newvalue,$values)) { echo "$newvalue is already in the array!"; }
?>
