Detect link content type with PHP

Question

How can I detect the content type of a link?

Users can upload links into thee web. And I'd need to save the link type (a video, a image...) in the DB (mysql).

I've found one answer (using the HTTP HEAD) with Java: Selenium 2: Detect content type of link destinations . However I'm using PHP.

Thanks.

score 3 · Accepted Answer · answered Feb 20 '12 at 17:20

3

That solution applies, in the abstract, to PHP as well.

The way you detect a link target's content type is by performing an HTTP HEAD request (such as with the curl extension for PHP, or the get_headers function) and then reading the returned Content-Type header.

Make sure to fail gracefully if the remote end is inaccessible.

answered Feb 20 '12 at 17:20

Borealid

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note that `get_headers` will do a GET request unless you change the method via a custom stream context – Gordon Feb 20 '12 at 17:24

score 2 · Answer 2 · answered Feb 20 '12 at 17:19

2

Googling a little found me this:

http://php.net/manual/en/function.getallheaders.php

You then can read the "content-type" header entry.

answered Feb 20 '12 at 17:19

poljpocket

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note that `get_headers` will do a GET request unless you change the method via a custom stream context – Gordon Feb 20 '12 at 17:26

score 1 · Answer 3 · answered Feb 20 '12 at 17:18

1

get_headers - and check for Content-type header.

answered Feb 20 '12 at 17:18

Bartosz Grzybowski

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note that `get_headers` will do a GET request unless you change the method via a custom stream context – Gordon Feb 20 '12 at 17:24

Detect link content type with PHP

3 Answers3