Advanced usage of file_get_contents, file_get_contents_PHP tutorial

Advanced usage of file_get_contents, file_get_contents

First solve the timeout problem of file_get_contents. After the timeout returns an error, try again like settimeout in js. If the error exceeds 3 or 5 times After that, it was confirmed that it could not connect to the server and gave up completely.
Here are two simple solutions:

1. Increase the timeout time limit

Note: set_time_limit only sets the timeout time of your PHP program, not the file_get_contents function read The timeout period for retrieving 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:
PHP code

$opts = array(
'http'=>array(
'method'= > ;"GET",
          'timeout'=>60,
              )
                                                                                                                             file_get_contents ('http://www.example.com', false, $context);
fpassthru($fp);

2. Multiple attempts

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

The above method is OK for dealing with timeouts. Next, let’s demonstrate using file_get_contents to implement Post, as follows:
PHP code

function Post($url, $post = null){
$context = array();
if ( is_array($post)) {
                                                                                                               method' = > 'POST',
'content' => http_build_query($post, '', '&'),
, stream_context_create($context));
}

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

echo Post('http://www.example.com', $data);

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




Usage of file_get_contents





file_get_contents — Read the entire file into a string

Description

string file_get_contents ( string $filename [, bool $use_include_path [, resource $context [, int $offset [, int $maxlen ] ]]] )Same as file(), except file_get_contents() reads the file into a string. Contents of length maxlen will be read starting at the position specified by the offset parameter. On failure, file_get_contents() returns FALSE.

The file_get_contents() function is the preferred method for reading the contents of a file into a string. If the operating system supports it, memory mapping technology will also be used to enhance performance.

Note: If you want to open a URL with special characters (for example, spaces), you need to use urlencode() for URL encoding.

Note: The context parameter can be ignored by passing NULL.

How to use php’s file_get_contents

file_get_contents() reads the contents of a file, including remote files!!
file_get_contents() function is the preferred method for reading the contents of a file into a string!!
< ?php
echo file_get_contents('www.baidu.com');
?>

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