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
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