php unset array by key 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: php unset array key

unset($dataArray['key']);

Example 3: php unset

// Destroy a variable
<?php
unset ($var1, $var2.... )
?>

Example 4: unset by key name php

unset($array['key-here']);