[PHP question]Image exists?

[monoVertex]

Ok, I want to know if there is any PHP functions that tells if a given link is an image.

Hope you get what I mean. Thanks in advance

 

[Vector]

You can use mime_content_type to detect the MIME type of the file, and then just test that for specific values, for example image/gif or image/jpeg [NOTE: I think even jpg files' mime types are jpeg]. For your purposes all you would want to know is if the first part of the MIME type read as "image", so you might want a snip of code like this...

$file = "myfile.png";
$type = mime_content_type($file);
if (strcmp(substr($type, 0, 6), "image/") == 0)
{
    //It's an image!
} else {
    //It's not an image!
}

Note I included the forward slash as a safeguard to make sure that was the end of the "type".

Failing that, you may find the exif_imagetype function helpful. An example is posted on that page, and so is a list of constants. I believe that if it is not an image this function will return FALSE, so you should be able to do a strict equality test.

$file = "myfile.png";
if (exif_imagetype($file) === FALSE)
{
    //It's not an image!
} else {
    //It's an image!
}

Hope that helps!
--Vector

 

[monoVertex]

Yes, that was what I was looking for, thanks a lot, +rep.

Btw, in the second code tag, you put 3 '='

 

[Persen]

Btw, in the second code tag, you put 3 '='

And it's meant to be like that.
=== means "Equals to and of same type"

 

[monoVertex]

Oh, didn't knew that, sorry for the mistake.