php first array key value code example
Example 1: first item in array php
$firstItem = array_shift($array);
Example 2: get key by value array php
<?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;
?>