Advanced usage sharing of file_get_contents

Regarding the advanced usage of file_get_contents, first solve the timeout problem of file_get_contents. After the timeout returns an error, make a try like settimeout in js. After more than 3 or 5 errors, it is confirmed that the server cannot be connected. completely give up.

Here are two simple solutions:

1. Increase the time limit of timeout

Note: set_time_limit is just Set the timeout for your PHP program, not the timeout for the file_get_contents function to read the URL.

I initially thought that set_time_limit could also affect file_get_contents, but it was later tested to be invalid. To truly modify the file_get_contents delay, you can use the timeout parameter of resource $context:

The PHP program code is as follows:

$opts = array(
    'http'=>array(
      'method'=>"GET",
      'timeout'=>60,
    )
);

$context = stream_context_create($opts);

$html =file_get_contents('http://www.php.cn', false, $context);
fpassthru($fp);

2. Multiple attempts

The PHP program code is as follows:

$cnt=0;
while($cnt < 3 && ($str=@file_get_contents(&#39;http...&#39;))===FALSE){
   $cnt++;
}

The above method is OK to deal with timeout. Next, we will demonstrate using file_get_contents to implement Post, as follows:
PHP program code

function Post($url, $post = null){
    $context = array();
    if (is_array($post)) {
      ksort($post);

      $context['http'] = array (
        'timeout'=>60,
        'method' => 'POST',
        'content' => http_build_query($post, '', '&'),
       );
    }

    return file_get_contents($url, false, stream_context_create($context));
}

$data = array (
    'name' => 'test',
    'email' => 'test@gmail.com',
    'submit' => 'submit',
);

echo Post('http://www.php.cn', $data);

Pay attention to the Set_time_out in the document header, otherwise the entire document will time out.

Related recommendations:
The difference between php fopen() and file_get_contents() is explained in detail

cURL is better than file_get_contents() in php Detailed explanation of examples

10 recommended articles about file_get_contents

The above is the detailed content of Advanced usage sharing of file_get_contents. For more information, please follow other related articles on the PHP Chinese website!