Answer Posted / jude jeevanraj.p

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

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