PHP function to provide Download with resume/speed/stream options

function.php

<?php 

            /* Function: download with resume/speed/stream options */ 

            /* 
                Parametrs: downloadFile(File Location, File Name, 
                max speed, is streaming   
                If streaming - movies will show as movies, images as images 
                instead of download prompt 
            */ 

            function downloadFile($fileLocation,$fileName,$maxSpeed = 100,$doStream =
            false){ 
                if (connection_status()!=0) return(false); 
                $extension = strtolower(end(explode('.',$fileName))); 

                /* List of File Types */ 
                $fileTypes['swf'] = 'application/x-shockwave-flash'; 
                $fileTypes['pdf'] = 'application/pdf'; 
                $fileTypes['exe'] = 'application/octet-stream'; 
                $fileTypes['zip'] = 'application/zip'; 
                $fileTypes['doc'] = 'application/msword'; 
                $fileTypes['xls'] = 'application/vnd.ms-excel'; 
                $fileTypes['ppt'] = 'application/vnd.ms-powerpoint'; 
                $fileTypes['gif'] = 'image/gif'; 
                $fileTypes['png'] = 'image/png'; 
                $fileTypes['jpeg'] = 'image/jpg'; 
                $fileTypes['jpg'] = 'image/jpg'; 
                $fileTypes['rar'] = 'application/rar';     

                $fileTypes['ra'] = 'audio/x-pn-realaudio'; 
                $fileTypes['ram'] = 'audio/x-pn-realaudio'; 
                $fileTypes['ogg'] = 'audio/x-pn-realaudio'; 

                $fileTypes['wav'] = 'video/x-msvideo'; 
                $fileTypes['wmv'] = 'video/x-msvideo'; 
                $fileTypes['avi'] = 'video/x-msvideo'; 
                $fileTypes['asf'] = 'video/x-msvideo'; 
                $fileTypes['divx'] = 'video/x-msvideo'; 

                $fileTypes['mp3'] = 'audio/mpeg'; 
                $fileTypes['mp4'] = 'audio/mpeg'; 
                $fileTypes['mpeg'] = 'video/mpeg'; 
                $fileTypes['mpg'] = 'video/mpeg'; 
                $fileTypes['mpe'] = 'video/mpeg'; 
                $fileTypes['mov'] = 'video/quicktime'; 
                $fileTypes['swf'] = 'video/quicktime'; 
                $fileTypes['3gp'] = 'video/quicktime'; 
                $fileTypes['m4a'] = 'video/quicktime'; 
                $fileTypes['aac'] = 'video/quicktime'; 
                $fileTypes['m3u'] = 'video/quicktime'; 

                $contentType = $fileTypes[$extension]; 


                header("Cache-Control: public"); 
                header("Content-Transfer-Encoding: binary\n"); 
                header('Content-Type: $contentType'); 

                $contentDisposition = 'attachment'; 

                if($doStream == true){ 
                    /* extensions to stream */ 
                    $array_listen = array('mp3','m3u','m4a','mid','ogg','ra','ram','wm', 
                    'wav','wma','aac','3gp','avi','mov','mp4','mpeg','mpg','swf','wmv','divx','asf'); 
                    if(in_array($extension,$array_listen)){  
                        $contentDisposition = 'inline'; 
                    } 
                } 

                if (strstr($_SERVER['HTTP_USER_AGENT'], "MSIE")) { 
                    $fileName= preg_replace('/\./', '%2e', $fileName, substr_count($fileName,
            '.') - 1); 
                    header("Content-Disposition: $contentDisposition;
            filename=\"$fileName\""); 
                } else { 
                    header("Content-Disposition: $contentDisposition;
            filename=\"$fileName\""); 
                } 

                header("Accept-Ranges: bytes");    
                $range = 0; 
                $size = filesize($fileLocation); 

                if(isset($_SERVER['HTTP_RANGE'])) { 
                    list($a, $range)=explode("=",$_SERVER['HTTP_RANGE']); 
                    str_replace($range, "-", $range); 
                    $size2=$size-1; 
                    $new_length=$size-$range; 
                    header("HTTP/1.1 206 Partial Content"); 
                    header("Content-Length: $new_length"); 
                    header("Content-Range: bytes $range$size2/$size"); 
                } else { 
                    $size2=$size-1; 
                    header("Content-Range: bytes 0-$size2/$size"); 
                    header("Content-Length: ".$size); 
                } 

                if ($size == 0 ) { die('Zero byte file! Aborting download');} 
                set_magic_quotes_runtime(0);  
                $fp=fopen("$fileLocation","rb"); 

                fseek($fp,$range); 

                while(!feof($fp) and (connection_status()==0)) 
                { 
                    set_time_limit(0); 
                    print(fread($fp,1024*$maxSpeed)); 
                    flush(); 
                    ob_flush(); 
                    sleep(1); 
                } 
                fclose($fp); 

                return((connection_status()==0) and !connection_aborted()); 
            }  

            /* Implementation */ 
            downloadFile('fileLocation','fileName.ext',900,false); 
?>