PHP unset() Function
❮ PHP Variable Handling Reference
Example
Unset variables:
<?php
$a = "Hello world!";
echo
"The value of variable 'a' before unset: " . $a . "<br>";
unset($a);
echo
"The value of variable 'a' after unset: " . $a;
?>
Try it Yourself »
Definition and Usage
The unset() function unsets a variable.
Syntax
unset(variable, ....);
Parameter Values
Parameter | Description |
---|---|
variable | Required. Specifies the variable to unset |
... | Optional. Another variable to unset |
Technical Details
Return Value: | None |
---|---|
Return Type: | None |
PHP Version: | 4.0+ |
❮ PHP Variable Handling Reference