_php tips for file_get_contents high usage examples in PHP

The example of this article tells the PHP file_get_contents advanced usage, share for everybody reference. The specific analysis is as follows:

First of all, solve the file_get_contents timeout problem, after the timeout return error, like JS in the settimeout as an attempt, error more than 3 times or 5 times after the confirmation as unable to connect the server and completely give up.
Here's a quick overview of two solutions:

One, increase time limit of timeout

Note: Set_time_limit only sets the timeout time for your PHP program, not the timeout for the file_get_contents function to read the URL.

I initially thought Set_time_limit could also affect File_get_contents, which was later tested to be ineffective. The real modification of the file_get_contents delay can be resource $context timeout parameters:

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.jb51.net ', false, $context);
Fpassthru ($FP);

Second, many attempts

The PHP program code is as follows:

$cnt =0;
while ($cnt < 3 && ($str = @file_get_contents (' http ... ')) ===false {
   $cnt + +;
}

The above method of dealing with timeout is OK. Next, I'll show you how to implement post with File_get_contents, 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 '
); C17/>echo Post (' http://www.jb51.net ', $data);

Note the set_time_out of the document header or the entire document will be timed out.

I hope this article will help you with the learning of PHP programming.