PhP Upload progress in PhP 5.4 is not working. Session variables not set
ajax, file-upload, jquery, php
Solution
There could be some issues, I have listed down few of them.
- The web server's request buffering has to be disabled for this to work properly, else PHP may see the file upload only once fully uploaded.
- This feature doesn't work, when your webserver is running PHP via FastCGI.
- Don't forget, that the session has to be initialized before the form is generated, otherwise you will get no information in the session.
- It won't work in PHP 5.3 or earlier.
- Note that if you run that code and you print out the content of $_SESSSION[$key] you get an empty array due that session.upload_progress.cleanup is on by default and it cleans the progress information as soon as all POST data has been read. Set it to Off or 0 to see the content of $_SESSION[$key].
This can help you to track your progress bar http://pecl.php.net/package/uploadprogress
I hope this will help you to dig out the problem.
Problem
I have a problem with PhP File Upload progress monitor at the very start. First, here are the relevant PhP.ini settings (Directive, Local Value and Master Value): ``` session.upload_progress.cleanup On On session.upload_progress.enabled On On session.upload_progress.freq 1% 1% session.upload_progress.min_freq 1 1 session.upload_progress.name PHP_SESSION_UPLOAD_PROGRESS PHP_SESSION_UPLOAD_PROGRESS session.upload_progress.prefix upload_progress_ upload_progress_ ``` Here is the form (simplified): ``` <form id="fileupload" style="position:relative;" target="iframe_fileupload" action="http://www.athiyoga.org/testupload.php" method="POST" enctype="multipart/form-data"> <input type="hidden" name="<?echo ini_get("session.upload_progress.name");?>" value="first"/> <input type="file" name="file_1"> <button type="submit" >Start Submit</button> </form> ``` I have JQUERY Ajax code, in the same PhP file (of course, as a JS script), as in: ``` $('#fileupload').submit(function(event){ //UPDATED THIS PART after reading: http://stackoverflow.com/questions/19336610/delay-in-populating-session-upload-progress-data //POSTING the magic variable PHP_SESSION_UPLOAD_PROGRESS during status inquiry too var params = {PHP_SESSION_UPLOAD_PROGRESS:"first", some_var:20 }; var data_params = jQuery.param( params ); setTimeout(function(){ upload_promise = $.ajax({ url: 'upload_status.php', data: data_params, dataType: 'html', type : 'POST', cache : false }); $.when(upload_promise).done(function(status_response){ $('#response_status').html(status_response); }); },5000); ... ... ``` The upload_status.php simply echoes the $_SESSION array. I also set a test session variable in the form-php to make sure that the AJAX (thru upload_status.php) picks that session variable. It does. But not a sign (no variable/index) of the upload status in the $_SESSION array! The files get uploaded. I made sure that the files are big enough so that the 5000ms is sufficient to report some intermediate status. I have never implemented PhP file upload progress bar before so I wonder if I am missing something. Once I get one status-point in the upload, I will be able to do the rest. Thanks