PHP disk_free_space( ) Function

The disk_free_space() function in PHP is an inbuilt function which is used to return the amount of free space in a specified directory. The disk_free_space() function denotes the free space in bytes.

It returns the available space on a filesystem or on a disk partition. The disk_free_space() function returns the number of bytes available on the corresponding filesystem or disk partition for a specified directory inputted as a string.

Syntax:

float disk_free_space ( $directory )

Parameters: The disk_free_space() function in PHP accepts one parameter which is $directory. This parameter specifies the directory which has to be checked.

Return Value: It returns the available space on a filesystem or on a disk partition.

Errors And Exception:

1. The disk_free_space() function in PHP may give improper results if a file name is given as parameter instead of a directory.
2. The disk_free_space() function in PHP doesn’t works for remote files.It only works on files which are accessible by the server’s filesystem.

Examples:

Input : disk_free_space("D:");
Output : 10969328844

Input : disk_free_space("C:");
Output : 10969327231

Below program illustrates the disk_free_space() function:

Program 1:

<?php

// specifying directory to check for free space
echo disk_free_space("D:");

?>

Output:

10969328844

Program 2:

<?php

// specifying directory to check for free space
echo disk_free_space("C:");

?>

Output:

10969327231

Reference:
http://php.net/manual/en/function.disk-free-space.php