How to determine the file size before HTML/PHP Upload?

Question

Possible Duplicate:
Client Checking file size using HTML5?

How can I inform the server about the file size, before the file is being transmitted? With HTML/HTML5, JS and PHP (without Flash)?

I want to prevent it, that large files are uploaded and this before the upload process; is it possible?

thank you very much and sorry for my german-english..

eb

score 1 · Answer 1 · answered Jul 24 '12 at 09:13

1

if (typeof FileReader !== "undefined") {
var size = document.getElementById('myfile').files[0].size;
// check file size
}

answered Jul 24 '12 at 09:13

ManMohan Vyas

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check the post here http://stackoverflow.com/questions/4112575/client-checking-file-size-using-html5 – ManMohan Vyas Jul 24 '12 at 09:14

score 1 · Answer 2 · answered Jul 24 '12 at 09:13

1

For client side take a look at File API it's html5 feature though some, browsers won't work. compatibility list

answered Jul 24 '12 at 09:13

Aurimas Ličkus

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asprin · Answer 3 · 2012-07-24T09:36:25.513

0

$(function(){

      $('#submit_button_id').click(function(){

            var f=this.files[0]
            if(f.size > 10000 || f.fileSize > 10000)
            {
               return false;
            }
        });
    });

edited Jul 24 '12 at 09:36

answered Jul 24 '12 at 09:11

asprin

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The asker wants to prevent large files beinguploaded and this would only be available after the file has been uploaded – klennepette Jul 24 '12 at 09:15
in this case the transmission (upload) has finished – donald123 Jul 24 '12 at 09:15
Updated to check at client side before uploading – asprin Jul 24 '12 at 09:19

Dennis Hackethal · Answer 4 · 2015-07-17T17:02:52.990

0

Have a look at the PHP filesize function.

Also, you can use $_FILES["fieldname"]["size"] and then check:

if($_FILES["fieldname"]["size"]>150000){ echo "too large"; exit;}

edited Jul 17 '15 at 17:02

answered Jul 24 '12 at 09:12

Dennis Hackethal

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This is not before the upload process though as requested. They might have already waited an age to upload a large file before you reject it which I assume is what the OP wants to prevent. – Chris Jul 24 '12 at 09:13
Good point. The server will not be notified about the file size if it is done client side, though, so server side validation will have to be done anyways. Maybe this snippet helps for that :) – Dennis Hackethal Jul 24 '12 at 09:33

score -1 · Answer 5 · answered Jul 24 '12 at 09:18

-1

Think the only way to realize your task is to validate via JS before submit. Take a look at this Validation by JS

answered Jul 24 '12 at 09:18

donald123

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How to determine the file size before HTML/PHP Upload?

5 Answers5