remove array without changing index php code example

Example 1: php delete element by value

$colors = array("blue","green","red");

//delete element in array by value "green"
if (($key = array_search("green", $colors)) !== false) {
    unset($colors[$key]);
}

Example 2: how to delete item from array php

$array = [0 => "a", 1 => "b", 2 => "c"];
unset($array[1]);