curl_exec is directly outputing data?

Question

I have this code

<?php
function get(){
        $ch = curl_init();

        curl_setopt($ch, CURLOPT_URL, "http://stackoverflow.com/");
        curl_setopt($ch, CURLOPT_HEADER, 0);
        $c = curl_exec($ch);
        curl_close($ch);
        die("A");
        return $c;
}

$first = get();


?>

but look what's output! It just prints off everything returned from curl_exec();

how is that possible?

@downvoter: Can you at least say what is wrong with this question ? — genesis
– genesis, Commented Jul 15, 2011 at 20:02
The question is so simple, some think it hurts. See the answer. — hakre
– hakre, Commented Jul 15, 2011 at 20:05
Hey I'd recommend not printing out the stackoverflow page in an SO question. It feels like phishing and confuses the shit out of ppl regardless :) — Ben G
– Ben G, Commented Jul 15, 2011 at 20:06
if you click to /login it throws you 404 so I think you/I don't have to worry about that ;) — genesis
– genesis, Commented Jul 15, 2011 at 20:10
however your're right. Added warning at the very top of that demo — genesis
– genesis, Commented Jul 15, 2011 at 20:13

hakre · Accepted Answer · 2011-07-15 20:04:45Z

2

Yes (as you already have tested).

curl_exec ^{PHP Manual} does return output directly to the browser unless you make use of the CURLOPT_RETURNTRANSFER constant as documented.

answered Jul 15, 2011 at 20:04

community wiki

hakre

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7 Comments

genesis Over a year ago

It does not make sense. There is "Returns TRUE on success or FALSE on failure. " but there isn't "Outputs result on success or returns FALSE on failure. " However it works. Thanks

Marc B Over a year ago

@genesis: it does make sense. turning on returntransfer makes curl_exec RETURN the fetched data, instead of directly outputting it.

hakre Over a year ago

@genesis: Looks like you have overseen it: 1.) Returns TRUE on success or FALSE on failure. However, if the CURLOPT_RETURNTRANSFER option is set, it will return the result on success, FALSE on failure. - so read the whole text that is provided under Return Values - always. And 2.) next to that there is a code example below on that page that has a comment next to the curl_exec line that states: grab URL and pass it to the browser. So next tip is to read the examples.

genesis Over a year ago

yup, you're right. Why did you put this post to community wiki ?

hakre Over a year ago

Because the answer was so obvious that there's only one answer. If other folks want to contribute to it, that makes more sense than if everybody is answering nearly the same but on their own. And it protects me and others from downvotes on the answer, so some little precaution in this great browser game.

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