PHP unset() Function

PHP unset() Function

The unset() function in PHP is used to unset a given variable. This function destroys the specified variables.

If this function is called inside any user-defined function, then it unsets the value associated with the variables inside it and leaves the value which is initialized outside it.

Syntax

unset ( mixed $var [, mixed $... ] )

Parameter

var(required)- This parameter represents the variable to unset.

Return

Example 1

Output

Before the unset() function: Hello World
After the unset() function:

Example 2

Output

The variable: TutorialAndExamples
After the unset() function...
The variable: TutorialAndExamples

Example 3

Output

The variable: TutorialAndExamples
After the unset() function...
The variable:

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