Simple onchange post submit

Question

I have the following form:

    <form id="MainForm" enctype="multipart/form-data" method="post" action="index.php"> 
            <input type="file" name="file" id="file" class="upload" onchange="document.getElementById('MainForm').submit();" title="Go!" accept="image/*">
    </form>

And in the beginning of the same page, in the php:

 if(isset($_POST['file']))
 {     
     echo 'ok'; // and do stuff latter
 }

The idea is to send the file when I select it, without having to press any kind of submit button, but its not echoing ok. When I change my form method to get, and put $_GET instead of $_POST it echoes ok, but I need to do it with post and I couldn't figure out what I'm missing yet.

Johannes · Answer 1 · 2015-12-12T00:40:42.013

0

SORRY, I pasted something wrong in there without rechecking it - that made no sense. I edited it now, hopefully should make more sense...

if this if(isset($_POST['file']))is on the same page, it's referring to something that comes from a previous page, so posting something on that page and referring to it on the same page won't work

edited Dec 12 '15 at 00:40

answered Dec 12 '15 at 00:08

Johannes

64,305
18
73
130

I'm actually handling all my requests like that, on the same page 'if(isset($_POST['submit ']' { do stuff } . Everything is working fine but this one. Am I handling all the posts wrongly? – sorold Dec 12 '15 at 03:02

Billy · Accepted Answer · 2015-12-12T11:27:19.210

0

try this,

   <?php  if($_FILES['file']['size']>0){     
 echo 'ok'; // and do stuff latter
 }else{
?>

 <form id="MainForm" enctype="multipart/form-data" method="post" action="#"> 
        <input type="file" name="file" id="file" class="upload" onchange="document.getElementById('MainForm').submit();" title="Go!" accept="image/*">
</form>
<?php
   }
?>

edited Dec 12 '15 at 11:27

answered Dec 12 '15 at 00:12

Billy

2,448
1
10
13

had the wrong name in the $_FILES var, edited now, sorry – Billy Dec 12 '15 at 00:14
I got some minor problems but I guess I can work my way around them. This seems to be the right way. thanks – sorold Dec 12 '15 at 03:08

Simple onchange post submit

2 Answers2