Unset a given variable
Syntax
unset ( mixed $var [, mixed $... ] ) : void
Parameters
var
The variable to be unset.
...
Another variable ...
Return
No value is returned.
Examples
1
<? $var = 1; unset($var); var_dump($var); ?>
NULL
2
<? $var1 = 1; $var2 = 2; $var3 = 3; unset($var1, $var2, $var3); var_dump($var1, $var2, $var3); ?>
NULL NULL NULL
3
<? $var = array(0, 1, 2); unset($var); var_dump($var); ?>
NULL
4
<? $var = array(0, 1, 2); unset($var[1]); print_r($var); ?>
Array
(
[0] => 0
[2] => 2
)
5
<?
$var = array("a" => 0, "b" => 1, "c" => 2);
unset($var["b"]);
print_r($var);
?>
Array
(
[a] => 0
[c] => 2
)
