PHP cURL not taking time outs into account - php

Question

I have a simple PHP script that uses cURL to grab the contents of a URL:
$curlOptions = [
CURLOPT_URL => $url,
CURLOPT_CUSTOMREQUEST => 'GET',
CURLOPT_HEADER => TRUE,
CURLOPT_FOLLOWLOCATION => TRUE,
CURLOPT_MAXREDIRS => 5,
CURLOPT_CONNECTTIMEOUT => 3,
CURLOPT_TIMEOUT => 5,
CURLOPT_NOBODY => TRUE,
CURLOPT_RETURNTRANSFER => TRUE,
];
$curl = curl_init();
curl_setopt_array( $curl, $curlOptions );
$curlResult = curl_exec( $curl );
$status = curl_getinfo( $curl, CURLINFO_HTTP_CODE );
curl_close( $curl );
However, in some circumstances I clearly see durations of 20 seconds or more eventhough I specified lower time out values for CURLOPT_CONNECTTIMEOUT and CURLOPT_TIMEOUT.
How can I make cURL time out at the values I specified?
UPDATE:
All the cURL's that take 20 seconds to complete return a "status" of 0. Its probably a DNS problem where it can't resolve the host. I would assume that CURLOPT_CONNECTTIMEOUT would take care of this?

Answer 1

It seems that your code works perfectly.
I've created a simple sleep page, you can check it (gets sleep time as input).
In case that you find cases where the code did not time out, I suggest checking the status code, and to see whether the code got hung on other part (maybe not the curl itself).
<?php
$url = "http://funnify.me/sleep.php?sleep=12"; // time in seconds
$curlOptions = [
CURLOPT_URL => $url,
CURLOPT_CUSTOMREQUEST => 'GET',
CURLOPT_HEADER => TRUE,
CURLOPT_FOLLOWLOCATION => TRUE,
CURLOPT_MAXREDIRS => 5,
CURLOPT_CONNECTTIMEOUT => 8,
CURLOPT_TIMEOUT => 8,
CURLOPT_NOBODY => TRUE,
CURLOPT_RETURNTRANSFER => TRUE,
];
$curl = curl_init();
curl_setopt_array( $curl, $curlOptions );
$curlResult = curl_exec( $curl );
$status = curl_getinfo( $curl, CURLINFO_HTTP_CODE );
curl_close( $curl );
echo $status;
?>
Cheers,
Ika