Руководство по PHP
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disk_free_space

(PHP 4 >= 4.1.0)

disk_free_space -- Returns available space in directory

Description

float disk_free_space ( string directory)

Given a string containing a directory, this function will return the number of bytes available on the corresponding filesystem or disk partition.

Пример 1. disk_free_space() example

<?php
// $df contains the number of bytes available on "/"
$df = disk_free_space("/");
?>

Замечание: This function will not work on remote files as the file to be examined must be accessible via the servers filesystem.

See also disk_total_space()

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dirnameУровень вышеdisk_total_space