CURL PHP - missing output and unknown error

Question

I'm using the code below to query an api however I'm not seeing any output. The header is returned however I also get an error - "An error has occurred:" with nothing else - not very helpful to say the least. Does anyone know what I'm doing wrong here? (NB I've had to remove the user details for obvious reasons)

//Required Call Information;
$username = "xxxxxxxxxxxxx";
$password = "xxxxxxxxxxxxxxxxxxxxxxxxxx";
$remote_url = 'https://xxxxxxxxxxxxx.com/xx.json';


// init the resource
$ch = curl_init();

//Header Information;
$headr = array();
$headr[] = "Authorization: Basic " . base64_encode("$username:$password");
$headr[] =  "X-Page:" . $pages;

// set curl options
curl_setopt($ch, CURLOPT_URL,$remote_url);
curl_setopt($ch, CURLOPT_HTTPHEADER,$headr);
curl_setopt($ch, CURLOPT_HEADER, true);

// execute
$output = curl_exec($ch);

// echo
echo $output;

// echo
print $output;

// free
curl_close($ch);

// check status of server being called vis crul
var_dump(curl_getinfo($ch));

//if error
if (!curl_exec($ch)) {
    // if curl_exec() returned false and thus failed
    echo 'An error has occurred: ' . curl_error($ch);
}
else {
    echo 'everything was successful';
}

Is the error you are getting a PHP fatal error or exception? — Dan Walker
– Dan Walker, Commented Feb 12, 2016 at 2:59
You need to set the CURLOPT_RETURNTRANSFER opt for curl_exec() to return the result. — Alejandro Iván
– Alejandro Iván, Commented Feb 12, 2016 at 4:33
Also, when doing if ( ! curl_exec(...) ), you're doing another call to the URL. Better use if ( $output === FALSE ). — Alejandro Iván
– Alejandro Iván, Commented Feb 12, 2016 at 4:36

Dan Walker · Accepted Answer · 2016-02-12 02:58:05Z

2

Adding the RETURN_TRANSFER curl opt will return data rather than a boolean when $output = curl_exec($ch); is called.

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

answered Feb 12, 2016 at 2:58

Dan Walker

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3 Comments

user1419810 Over a year ago

Thanks for this, fyi it turns out i also needed to add curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); to allow CURL to follow the redirect and retrieve information.

Moeez Over a year ago

I am still getting An error has occurred though i have added curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

Dan Walker Over a year ago

faisal1208 - maybe try setting curl_setopt($ch,CURLOPT_FAILONERROR,true); which may help with any errors. Also, check the HTTP response code as you might be getting a 404 or another error.

J_D · Accepted Answer · 2016-02-12 02:54:10Z

0

Add in the following curl opt and see what you get back:

curl_setopt($ch, CURLOPT_VERBOSE, true);

answered Feb 12, 2016 at 2:54

J_D

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1 Comment

user1419810 Over a year ago

Hey J_D, thanks for the input, I've just tried this and unfortunately this doesn't change anything, I still get an error without an error message.

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