Limiting file types/extensions when uploading files in an HTML form

Question

Is there any way to limit the type of file that can be uploaded using an HTML form via PHP? For example, I want to limit uploads to only .pdf files.

server-side limit or client-side limit?

Shad
– Shad

2011-08-15 21:52:01 +00:00
Commented Aug 15, 2011 at 21:52 — Shad
– Shad, Commented Aug 15, 2011 at 21:52

Igoris · Accepted Answer · 2011-08-15 22:29:18Z

2

Server side

Yes use superglobal $_FILES. look at this documentation page : PHP.net

It will get through basics, and then just look for file type, which is what you need to check with.

Client side

There are many ways to do this, but you can achieve this simply :

if((document.form1.upload.value.lastIndexOf(".jpg")==-1) {
   alert("Please upload only .jpg extention file");
   return false;
}

edited Aug 15, 2011 at 22:29

answered Aug 15, 2011 at 21:54

Igoris

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1 Comment

Naftali Over a year ago

there is also a type part to the $_FILES array which makes things much muuuuch easier ^_^

Naftali · Accepted Answer · 2011-08-15 21:50:21Z

1

Yes. just look in the $_FILES array and read the file type.

answered Aug 15, 2011 at 21:50

Naftali

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