Syntax: mixed array_search ( mixed $needle , array $haystack [, bool $strict = false ] ) Description: Searches the array for a given value and returns the corresponding key if successful <?php $array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red'); $key = array_search('green', $array); echo $key."<br/>"; $key = array_search('red', $array); echo $key."<br/>"; ?> OUTPUT 2 1... Read More »