Curl_Exec Printing Results When I Don't Want To

curl_exec printing results when I don't want to

Set CURLOPT_RETURNTRANSFER option:

// ...
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

$result = curl_exec($ch);

Per the docs:

CURLOPT_RETURNTRANSFER - TRUE to return the transfer as a string of the return value of curl_exec() instead of outputting it out directly.

Don't Echo Out cURL

Put this on line 2:

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

Why does curl_exec print null?

Add

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

php curl_exec returns empty

curl_exec will return false when the request failed. Adjust your function to this :

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_PROXY, $proxy); // $proxy is ip of proxy server
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);

$httpCode = curl_getinfo($ch , CURLINFO_HTTP_CODE); // this results 0 every time
$response = curl_exec($ch);

if ($response === false) 
    $response = curl_error($ch);

echo stripslashes($response);

curl_close($ch);

This way u'll see the curl error

cURL code in PHP dumps output to the page

Use this option to curl_setopt():

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

This will make curl_exec return the data instead of outputting it.

To see if it was successful you can then check $result and also curl_error().

Curl automatically display the result?

By default, the curl extension prints out the result.

You need to enable the CURLOPT_RETURNTRANSFER option, like so:

curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

After that option is enabled, curl_exec will return the result, instead.

prevent curl from directly echo/output returned data

You have to add curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); before curl_exec().

I don't know why curl doesn't just return by default.

What does curl_exec return?

From the manual:

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.

Your code already contains this line (which is good):

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

The 1 means you will receive an explanatory result back from $result = curl_exec ($ch) instead of just true or false.

Your error checking code could therefore look like:

$result = curl_exec ($ch);
if($result === FALSE) {
    die(curl_error($ch));
}

You can also check they type of variable returned via var_dump: var_dump($result).

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