PHP returns the total disk size of a directory

php editor Baicao will introduce to you today how to obtain the total disk size of a specified directory through PHP code. In web development, sometimes you need to get the total disk size of a directory for some statistics or limitations. This function can be easily implemented through simple PHP code. Next let us take a look at the specific implementation method!

Calculate the total directory disk size in PHP

background

In some cases, it is necessary to determine the amount of disk space occupied by a specific directory or its subdirectories. php provides powerful functions to perform this task, allowing developers to easily calculate the total disk size of a directory.

method

1. Use disk_total_space() function

disk_total_space() function gets the total disk capacity of a given directory or file.

$directory = "/var/log";
$total_space = disk_total_space($directory);
echo "Total disk capacity: $total_space bytes";

2. Use dir() and filesize() functions

dir() function opens a directory and generates a Directory object. The filesize() function gets the size of the specified file.

$directory = "/var/log";
$total_size = 0;
if ($dh = opendir($directory)) {
while (($file = readdir($dh)) !== false) {
if ($file != "." && $file != "..") {
$total_size = filesize($directory . "/" . $file);
}
}
closedir($dh);
}
echo "Total disk size: $total_size bytes";

3. Use RecursiveIteratorIterator and SplFileInfo classes

The RecursiveIteratorIterator class allows iteration of files and directories within a directory and its subdirectories. The SplFileInfo class provides additional information about each file, including file size.

use RecursiveIteratorIterator;
use RecursiveDirectoryIterator;
use SplFileInfo;

$directory = "/var/log";
$total_size = 0;
$iterator = new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($directory),
RecursiveIteratorIterator::SELF_FIRST
);
foreach ($iterator as $file) {
if ($file->isFile()) {
$total_size = $file->getSize();
}
}
echo "Total disk size: $total_size bytes";

4. Use scandir() and array_sum() functions

The

scandir() function scans a directory and returns an array of files and directories. The array_sum() function calculates the sum of the values ​​in an array.

$directory = "/var/log";
$files = scandir($directory);
$total_size = array_sum(array_map("filesize", $files));
echo "Total disk size: $total_size bytes";

optimization

• Using iterators (such as RecursiveIteratorIterator) is more efficient than using directory functions directly.
• Avoid using the glob() function as it is less efficient.
• If you need to calculate the directory size frequently, please consider using the caching mechanism.

in conclusion

PHP provides several methods for calculating the total size of a directory disk. Developers can choose the method that best suits the needs of their specific application. By optimizing the code and utilizing the correct functions, PHP can efficiently and accurately determine the amount of disk space occupied by a directory.

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