Error on file type

Here is my code

if ($_FILES['foto']['size'] > 200000) die ('file too big');
if($_FILES['foto']['type'] !== "image/pjpeg" ||
$_FILES['foto']['type'] !=="image/jpeg" || $_FILES['foto']['type']
!=="image/gif")  die ('file not allowed!');

no matter what i upload it always showing "file not allowed". It works fine if i delete the file checking part.

I wonder where are the mistakes.

Thanks

== update=== var dump string(10) "image/jpeg开发者_Go百科"

This is a contradiction (Always False):

$_FILES['foto']['type'] !== "image/pjpeg" ||
$_FILES['foto']['type'] !== "image/jpeg" || 
$_FILES['foto']['type'] !== "image/gif"

Since for the whole statement to be true $_FILES['foto']['type'] Must be equal to "image/pjpeg", "image/jpeg", and "image/gif" at the same time.

You mean to be using && instead of ||, so you get:

$_FILES['foto']['type'] !== "image/pjpeg" &&
$_FILES['foto']['type'] !== "image/jpeg" &&
$_FILES['foto']['type'] !== "image/gif"

You should log $_FILES['foto']['size'] and $_FILES['foto']['type']. That will at least let you know what is being used during your comparisons.

Can't figure out how to do a multiline edit of my comment:

if ($_FILES['foto']['size'] > 200000) die ('file too big');
if($_FILES['foto']['type'] !== "image/pjpeg" ||
$_FILES['foto']['type'] !=="image/jpeg" || $_FILES['foto']['type']
!=="image/gif")  die ('file not allowed!');

Maybe try this:

if ($_FILES['foto']['size'] > 200000) die ('file too big');
$file_types = array("image/pjpeg", "image/jpeg", "image/"gif");
if(!in_array($_FILES['foto']['type'],$file_types)) die ('not allowed');