<?php
function compressImage($source, $destination, $quality) { 
    // Get image info 
    $imgInfo = getimagesize($source); 
    $mime = $imgInfo['mime']; 
     
    // Create a new image from file 
    switch($mime){ 
        case 'image/jpeg': 
            $image = imagecreatefromjpeg($source); 
            break; 
        case 'image/png': 
            $image = imagecreatefrompng($source); 
            break; 
        case 'image/gif': 
            $image = imagecreatefromgif($source); 
            break; 
        default: 
            $image = imagecreatefromjpeg($source); 
    } 
     
    // Save image 
    imagejpeg($image, $destination, $quality); 
     
    // Return compressed image 
    return $destination; 
}

function convert_filesize($bytes, $decimals = 2) { 
    $size = array('B','KB','MB','GB','TB','PB','EB','ZB','YB'); 
    $factor = floor((strlen($bytes) - 1) / 3); 
    return sprintf("%.{$decimals}f", $bytes / pow(1024, $factor)) . @$size[$factor]; 
}

?>