How to delete a file using PHP ?

To delete a file by using PHP is very easy. Deleting a file means completely erase a file from a directory so that the file is no longer exist. PHP has an unlink() function that allows to delete a file. The PHP unlink() function takes two parameters $filename and $context. Syntax:

unlink( $filename, $context );

Below programs illustrate the above approach: Program 1: This program uses unlink() function to remove file from directory. Suppose there is a file named as “gfg.txt”

php

<?php
// PHP program to delete a file named gfg.txt
// using unlink() function

$file_pointer = "gfg.txt";

// Use unlink() function to delete a file
if (!unlink($file_pointer)) {
    echo ("$file_pointer cannot be deleted due to an error");
}
else {
    echo ("$file_pointer has been deleted");
}

?>

Output:

gfg.txt has been deleted

Program 2: This program uses unlink() function to delete a file from folder after using some operation. 

php

<?php
// PHP program to delete a file named gfg.txt
// using unlink() function

$file_pointer = fopen('gfg.txt', 'w+');

// writing on a file named gfg.txt
fwrite($file_pointer, 'A computer science portal for geeks!');
fclose($file_pointer);

// Use unlink() function to delete a file
if (!unlink($file_pointer)) {
    echo ("$file_pointer cannot be deleted due to an error");
}
else {
    echo ("$file_pointer has been deleted");
}

?>

Output:

Warning: unlink() expects parameter 1 to be a valid path, resource
given in C:\xampp\htdocs\server.php on line 12
Resource id #3 cannot be deleted due to an error

Note: If the file does not exist then it will display an error.

PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples.