Not recognizing file type

[9three]

Hey,

 

I'm creating an uploader and for some reason when I add to check other mime type files it doesnt recognize it properly.

 

  if ($_FILES['file']['type'] != 'image/jpeg' || $_FILES['file']['type'] != 'image/png' || $_FILES['file']['type'] != 'image/gif') {
    echo '
    <script type="text/javascript">
    parent.document.getElementById("uploadTxt").innerHTML = "That file extension is not allowed: '.$_FILES['file']['type'].' Please try again."
    </script>';
    return false;
  }

 

This doesn't work. But if I remove

|| $_FILES['file']['type'] != 'image/png' || $_FILES['file']['type'] != 'image/gif'

 

And just leave != 'image/jpeg' it works correctly. It's confusing me? 

[nadeemshafi9]

see whats going in and confirm its not your fault

echo $_FILES['file']['type'];

if ($_FILES['file']['type'] != 'image/jpeg' || $_FILES['file']['type'] != 'image/png' || $_FILES['file']['type'] != 'image/gif') {
    echo '
    <script type="text/javascript">
    parent.document.getElementById("uploadTxt").innerHTML = "That file extension is not allowed: '.$_FILES['file']['type'].' Please try again."
    </script>';
    return false;
  }

[9three]

I'm already echoing it..

 

parent.document.getElementById("uploadTxt").innerHTML = "That file extension is not allowed: '.$_FILES['file']['type'].' Please try again."

 

I've tried 2 files:

 

a jpg and a jpeg

 

jpg works

 

jpeg does not

 

Output: That file extension is not allowed: image/jpeg Please try again.

[nadeemshafi9]

i think a whoile back i had this problem, and i think i rember it being that they have different mime types

[9three]

I tried png and gif and it doesn't work either. The mime type has to be jpeg for it to work correctly.

[nadeemshafi9]

trust me just print_r($_FILES['file']);

 

before you do any checking so you can see what php see's

[jcombs_31]

make sure you aren't exceeding any file size directives in php.ini, if the file is larger than what is allowed it is probably getting kicked out before it can analyze the mime-type.

[9three]

the jpeg I'm uploading is 1.21mb and it uploads correctly.

 

The png I just tried is 63kb.

[Mark Baker]

Think about the logic of

if ($_FILES['file']['type'] != 'image/jpeg' || $_FILES['file']['type'] != 'image/png' || $_FILES['file']['type'] != 'image/gif') {

Upload a gif file... first test ($_FILES['file']['type'] != 'image/jpeg') gives true. No further checking is done because you're using the || operator. Therefore, the whole "if" is true and the file is rejected.

 

Try using && instead of ||

[PFMaBiSmAd]

You should in fact be putting the accepted strings in to an array and then use the in_array function to test if the received value is in the array of accepted values.

[9three]

argh very true. my logic was off.

 

thanks.

[nadeemshafi9]

Think about the logic of

if ($_FILES['file']['type'] != 'image/jpeg' || $_FILES['file']['type'] != 'image/png' || $_FILES['file']['type'] != 'image/gif') {

Upload a gif file... first test ($_FILES['file']['type'] != 'image/jpeg') gives true. No further checking is done because you're using the || operator. Therefore, the whole "if" is true and the file is rejected.

 

Try using && instead of ||

 

those ones are hard to spot, i think you may have it there, well spotted