PHP unset() Function

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;
?>

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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