PHP – Converting bytes to a readable format

The following function takes in a number of bytes and the number of decimal places required in the output and returns the result in a readable format:

[codesyntax lang=”php”]

function readable_filesize($bytes, $dp = 1) {
	// Extensions used
	$extensions = array('B', 'KB', 'MB', 'GB', 'TB', 'PB');

	foreach ($extensions as $ext) {
		// If we can't divide again without getting < 1
		if ($bytes < 1024) {
			return number_format($bytes, $dp).$ext;
		}

		$bytes /= 1024;
	}

	// If we're here, we're at the end of the extensions array
	// thus return what we have
	return $bytes.$ext;
}

[/codesyntax]

Use like this:

[codesyntax lang=”php”]

echo readable_filesize(123456);

[/codesyntax]

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