PHP Curl Set timeout instance _php tips

The example in this article describes the Curl Timeout setting method in PHP. Share to everyone for your reference. The implementation methods are as follows:

There are many ways to access HTTP, you can use curl, sockets, file_get_contents () and other methods.
When you are accessing HTTP, you need to consider the problem of timeouts.

Curl Access http:

CURL is a common Lib library to access HTTP protocol interface, which has high performance and some concurrent support functions.
curl_setopt ($ch, opt) can set some time-out settings, mainly including:
① (important) Curlopt_timeout sets the maximum number of seconds that the curl allows to execute.
② (important) Curlopt_timeout_ms sets the maximum number of milliseconds that the curl allows to execute.
(Joined in the Curl 7.16.2.) Available from PHP 5.2.3)
③curlopt_connecttimeout the time to wait before initiating the connection, and if set to 0, wait indefinitely.
④curlopt_connecttimeout_ms the time, in milliseconds, that the attempt to connect waits.  If set to 0, wait indefinitely. (Joined in the Curl 7.16.2.) Available starting from PHP 5.2.3)
⑤curlopt_dns_cache_timeout sets the time to save DNS information in memory by default of 120 seconds.

1. Curl Ordinary Second level timeout:

Copy Code code as follows:

$ch = Curl_init ();
curl_setopt ($ch, Curlopt_url, $url);
curl_setopt ($ch, curlopt_returntransfer,1);
curl_setopt ($ch, curlopt_timeout,60); You just need to set a number of seconds to
curl_setopt ($ch, Curlopt_httpheader, $headers);
curl_setopt ($ch, curlopt_useragent, $defined _vars[' http_user_agent '));

2. Curl Ordinary Second level timeout use:

Copy Code code as follows:

curl_setopt ($ch, curlopt_timeout,60);

3. Curl needs to be increased if a millisecond timeout is required:

Copy Code code as follows:

Curl_easy_setopt (curl, curlopt_nosignal,1l);
Or
curl_setopt ($ch, curlopt_nosignal,true);//Support millisecond level timeout setting

I hope this article will help you with your PHP program design.