Does file_get_contents() have a timeout se

问题:

I am calling a series of links using the file_get_contents() method in a loop. Each link may take more than 15 minutes to process. Now, I worry about whether PHP's file_get_contents() has a timeout period?

If yes, it will time out with a call and move to next link. I don't want to call the next link without the prior one finishing.

So, please tell me whether file_get_contents() has a timeout period. The file which contains the file_get_contents() is set to set_time_limit() to zero (unlimited).

回答1:

The default timeout is defined by default_socket_timeout ini-setting, which is 60 seconds. You can also change it on the fly:

ini_set('default_socket_timeout', 900); // 900 Seconds = 15 Minutes

Another way to set a timeout, would be to use stream_context_create to set the timeout as HTTP context options of the HTTP stream wrapper in use:

$ctx = stream_context_create(array('http'=>
    array(
        'timeout' => 1200,  //1200 Seconds is 20 Minutes
    )
));

echo file_get_contents('http://example.com/', false, $ctx);

回答2:

As @diyism mentioned, "default_socket_timeout, stream_set_timeout, and stream_context_create timeout are all the timeout of every line read/write, not the whole connection timeout." And the top answer by @stewe has failed me.

As an alternative to using file_get_contents, you can always use curl with a timeout.

So here's a working code that works for calling links.

$url='http://example.com/';
$ch=curl_init();
$timeout=5;

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);

$result=curl_exec($ch);
curl_close($ch);
echo $result;

回答3:

It is worth noting that if changing default_socket_timeout on the fly, it might be useful to restore its value after your file_get_contents call:

$default_socket_timeout = ini_get('default_socket_timeout');
....
ini_set('default_socket_timeout', 10);
file_get_contents($url);
...
ini_set('default_socket_timeout', $default_socket_timeout);

回答4:

For me work when i change my php.ini in my host:

; Default timeout for socket based streams (seconds)
default_socket_timeout = 300