Using strrpos () with PHP

Possible duplicate:
How to make strpos case insensitive

I check to see if the string contains the text "People who love". Well the code works great! Moreover, it is case sensitive. What can I do to prevent this?

If the string "people who like to run" it returns false If the string "People who like to run" it returns true

I want this to be not case sensitive.

code:

<?php

$string = "People who like to run";

if (strrpos($string, 'People who like') === false) {
    echo "False";
}
else {
    echo "True";
}