Check Upload File Types Allowed

treeleaf20

I want users to be able to upload only ,jpg, .gif, .png. How can I check to make sure the type is allowed. I tried the following:

if ($_FILES['logo']['type'] != ".jpg" ||  != ".gif" || != ".png"){
echo "File type error";
}

I get the follow error: Parse error: parse error, unexpected T_IS_NOT_EQUAL in /home/web/public_html/file.php on line 48

Can anyone help. Thanks in advance.

crazychris

Use getimagesize() on the file ($_FILES['logo']['tmp_name']).

Returns an array with 4 elements.
Index 0 contains the width of the image in pixels.
Index 1 contains the height.
Index 2 is a flag indicating the type of the image: 1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(intel byte order), 8 = TIFF(motorola byte order), 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC, 14 = IFF, 15 = WBMP, 16 = XBM. These values correspond to the IMAGETYPE constants that were added in PHP 4.3.0.
Index 3 is a text string with the correct height="yyy" width="xxx" string that can be used directly in an IMG tag.

treeleaf20

What would the if statement look like in this example?

Thanks for the quick reply.

crazychris

$i=@getimagesize($_FILES['logo']['tmp_name']);
if (($i[2]==1) or ($i[2]==2) or ($i[2]==3)) {
 # OK
} else {
 # FAILS
}

The @getimagesize() is so that if the file is not an image, the error is suppressed.