unlink() is used to delete physical files...So lets say you have foo.txt somewhere on your server... unlink(foo.txt) would delete it. unset() is used to null out the value of a given variable. So for instance:
x = 200;
echo(x); // 200
unset(x);
echo(x); // null
The difference between the functions unlink and unset
unlink() is a function for file system handling.
It will simply delete the file in context.
Example for unlink() :
<?php
$fh = fopen('test.html', 'a');
fwrite($fh, '<h1>Hello world!</h1>');
fclose($fh);
unlink('test.html');
?>
unset() is a function for variable management.
It will make a variable undefined.
(or)
Unset () is used to destroy a variable in PHP. In can be used to remove a single variable, multiple variables, or an element from an array. It is phrased as Unset ($remove).
Also Known As: Unset Variable, Destroy Variable
Example for unset() :
<?php
// remove a single variable
unset($a);
// remove a single element in an array
unset($my_array['element']);
// remove multiple variables
unset($a, $b, $c);
?>
