search array like php code example

Example 1: get index of element in array php

$array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red');

$key = array_search('green', $array); // $key = 2;
$key = array_search('red', $array);   // $key = 1;

Example 2: like %% inside the array php

preg_match('~' . preg_quote('.SEARCH_ITEM.', '~') . '~', 'STRING');