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Thread: Download file from database(given upload scripts)

  1. #1
    Join Date
    May 2014
    Posts
    26

    Download file from database(given upload scripts)

    Hi PHP friends!!

    I have manage to make a script to upload file in database and its working. I will share to you the codes so for other viewers and readers to use also.

    PHP Code:
    if($result){
                if(
    $_FILES['LRCard']['name'] != ""){
                    
    $filename $_FILES['LRCard']['name'];
                    
    $ext strrchr($filename,".");
                    
    $LRCardname $student_id;
                    
    $LRCardname .="_"$filename
                    if(
    $ext ==".jpg" || $ext ==".jpeg" || $ext ==".JPG" || $ext ==".JPEG" || $ext ==".gif" || $ext ==".GIF"){
                        
    $size $_FILES['LRCard']['size'];
                        if(
    $size && $size 5000000){
                            
    $archive_dir "LRCards";
                            
    $userfile_tmp_name $_FILES['LRCard']['tmp_name'];
                            if(
    move_uploaded_file($userfile_tmp_name"$archive_dir/$LRCardname")){
                                
    /*
                                    if LRC is successfully uploaded then LRC is stored in database.
                                */
                                
    mysql_query("update student_information set LRCard='$LRCardname' where student_id='$student_id'"$link_id); 
                                
    $flag "success"
                                if(
    mysql_error()!=null){
                                    die(
    mysql_error());
                                }
     
                            }
                            else{
                                if(
    file_exists('LRCard/' $LRCardname)) {
                                    
    unlink('LRCards/' $LRCardname); 
                                }
                                
    rollbackData();
                            }
                        }
                        else{
                            if(
    file_exists('LRCards/' $LRCardname)) {
                                
    unlink('LRCard/' $LRCardname); 
                            }
                            
    rollbackData();
                            die(
    "You can upload LRCard of 5 MB size only. Please, try again.");
                        }
                    }
                    else{
                        if(
    file_exists('LRCards/' $LRCardname)) {
                            
    unlink('LRCards/' $LRCardname); 
                        }
                        
    rollbackData();
                        die(
    "You can upload LRCard of .jpg, .jpeg, .gif extensions only. Please, try again. ");
                    }
                }     
            }
            else{
                
    $flag="error";
            }
            if(
    $flag == "success"){
                
    mysql_query(" COMMIT ");
                
    $flag="success";
                if(
    mysql_error() != null){
                    die(
    mysql_error());
                }
            } 
    Now, my problem is how to make a Php script to DOWNLOAD this uploaded file considering the
    1. file path
    2. file name
    3. file extension.
    4. student_id (to determine the specific file from a specific student)

    My plan is to make a download button which hyperlink to download.php and after clicking that button the specified file to a specific student id will automatically be downloaded by the browser.

    Please advise..

  2. #2
    Join Date
    May 2014
    Posts
    26
    Specifically its not really file but image. Well i just thought the process may be different, i dunno.

    Please comment or suggest

  3. #3
    Join Date
    May 2014
    Posts
    26
    Hello there,,

    This is so far what i got
    This code is for the link.

    <a href="download.php?file=path/<?=$row['file_name']?>">Download</a>

    and this for the download.php which i think need modification to fit the upload requirements (as what i have posted above.)

    PHP Code:
    function download_file$fullPath ){

      
    // Must be fresh start
      
    if( headers_sent() )
        die(
    'Headers Sent');

      
    // Required for some browsers
      
    if(ini_get('zlib.output_compression'))
        
    ini_set('zlib.output_compression''Off');

      
    // File Exists?
      
    if( file_exists($fullPath) ){

        
    // Parse Info / Get Extension
        
    $fsize filesize($fullPath);
        
    $path_parts pathinfo($fullPath);
        
    $ext strtolower($path_parts["extension"]);

        
    // Determine Content Type
        
    switch ($ext) {
          case 
    "gif"$ctype="image/gif"; break;
          case 
    "jpeg":
          case 
    "jpg"$ctype="image/jpg"; break;
          default: 
    $ctype="application/force-download";
        }
        
    header("Pragma: public"); // required
        
    header("Expires: 0");
        
    header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        
    header("Cache-Control: private",false); // required for certain browsers
        
    header("Content-Type: $ctype");
        
    header("Content-Disposition: attachment; filename=\"".basename($fullPath)."\";" );
        
    header("Content-Transfer-Encoding: binary");
        
    header("Content-Length: ".$fsize);
        
    ob_clean();
        
    flush();
        
    readfile$fullPath );

      } else
        die(
    'File Not Found');

    }
    ?> 
    Pls advise..

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