PHP unset() Function
What is unset() function in PHP?
Explanation
unset() function is used to destroy a variable. In the case of global variable, it destroys only the value of the variable, which is assigned inside the current function. The variable retains the previous value.
unset(var_name)
<?php
$val1='Hscripts.com';
echo 'Before using unset() the value of $val1 is : '. $val1.'<br>';
unset($val1);
echo 'After using unset() the value of $val1 is : '. $val1;
?>
Result :
Before using unset() the value of $val1 is : Hscripts.com
After using unset() the value of $val1 is :
Use PHP unset function for unsetting all variables.
Syntax:
unset(var_name)
Example :
<?php
$val1='Hscripts.com';
echo 'Before using unset() the value of $val1 is : '. $val1.'<br>';
unset($val1);
echo 'After using unset() the value of $val1 is : '. $val1;
?>
Result :
Before using unset() the value of $val1 is : Hscripts.com
After using unset() the value of $val1 is :
Use PHP unset function for unsetting all variables.
