Linux Disk Usage PHP Script

linux-disk-usage.php

<?php
include_once './vendor/autoload.php';
use jc21\CliTable;
use jc21\CliTableManipulator;

// HOW TO USE:
// copy script ( linux-disk-usage.php ) to a folder on your system and cd to that folder
// composer require jc21/clitable
// php linux-disk-usage.php

function bytesToHumanReadable($bytes, $decimalPlaces = 2) {
    
    $type = array("bytes", "KB", "MB", "GB", "TB", "PB", "EXB", "ZB", "YB");
    $index = 0;
    
    while ($bytes >= 1024) {
        
        $bytes /= 1024;
        $index++;
    }

    $formattedBytes = number_format(((float) $bytes), $decimalPlaces);

    return ("" . $formattedBytes . " " . $type[$index]);
}

function getListOfFileSystems() {

    $mounted_file_systems = [];
    exec('findmnt -l -o TARGET', $mounted_file_systems);
    array_shift($mounted_file_systems); // remove output header
    sort($mounted_file_systems);

    return $mounted_file_systems;
}

function generateDiskUsageData() {

    $diskUsageData = [];

    foreach (getListOfFileSystems() as $mounted_file_system) {

        $freeSpace = disk_free_space($mounted_file_system);
        $totalSpace = disk_total_space($mounted_file_system);
        $usedSpacePercentage =  ($totalSpace <= 0) ? 0 :  (($totalSpace - $freeSpace) / $totalSpace) *  100;
        
        $diskUsageData[] = [
            'fs_name' => $mounted_file_system,
            'disk_free_space' => $freeSpace,
            'disk_total_space' => $totalSpace,
            'used_space_percent' => $usedSpacePercentage,
        ];
    }

    return $diskUsageData;
}

function generateDiskUsageDataHumanReadable() {

    $diskUsageData = generateDiskUsageData();

    foreach ($diskUsageData as $key => $data) {

        $diskUsageData[$key]['disk_free_space'] = bytesToHumanReadable($data['disk_free_space']);
        $diskUsageData[$key]['disk_total_space'] = bytesToHumanReadable($data['disk_total_space']);
    }

    return $diskUsageData;
}

function diskUsageInCliFormat($humanReadable=true) {
    
    $table = new CliTable;
    $table->setTableColor('blue');
    $table->setHeaderColor('cyan');
    $table->addField('File System', 'fs_name', false, 'white');
    $table->addField('Used Space %', 'used_space_percent', new CliTableManipulator('percent'), 'white');
    $table->addField('Free Space', 'disk_free_space', false, 'white');
    $table->addField('Total Space', 'disk_total_space', false, 'white');
    $table->injectData($humanReadable ? generateDiskUsageDataHumanReadable() : generateDiskUsageData());
    $table->display();
}

diskUsageInCliFormat(true);
diskUsageInCliFormat(false);

How to Use

• copy script ( linux-disk-usage.php ) to a folder on your system and cd to that folder
• composer require jc21/clitable
• php linux-disk-usage.php