How do you delete an element from a PHP array?

To delete an element from a PHP array, you call the unset function like this:

$arr = [ 
	"key1" => "value1",
	"key2" => "value2"
];

unset($arr["key2"]);

Unset also allows you to “undefine” a variable

$bob = true ;
unset($bob);
if (isset($bob)) {
 // nope
}