PHP access to remote file content function code _php tips

The following functions:

Copy Code code as follows:

?
/**
Get Remote file contents
@param $url File HTTP address
*/
function Fopen_url ($url)
{
if (function_exists (' file_get_contents ')) {
$file _content = @file_get_contents ($url);
} elseif (Ini_get (' Allow_url_fopen ') && ($file = @fopen ($url, ' RB ')) {
$i = 0;
while (!feof ($file) && $i + + < 1000) {
$file _content. = Strtolower (Fread ($file, 4096));
}
Fclose ($file);
} elseif (Function_exists (' Curl_init ')) {
$curl _handle = Curl_init ();
curl_setopt ($curl _handle, Curlopt_url, $url);
curl_setopt ($curl _handle, curlopt_connecttimeout,2);
curl_setopt ($curl _handle, curlopt_returntransfer,1);
curl_setopt ($curl _handle, curlopt_failonerror,1);
curl_setopt ($curl _handle, curlopt_useragent, ' Trackback Spam Check '); Reference spam Check
$file _content = curl_exec ($curl _handle);
Curl_close ($curl _handle);
} else {
$file _content = ';
}
return $file _content;
}
?>

Related explanations:
1,ini_get:returns the value of the configuration option as a string on success, or a empty string on failure (read php.ini Values in the configuration file)
2,; Whether to allow the treatment of URL (like http://or ftp://) as files.
Allow_url_fopen = On (content in configuration file)
3,fopen ("RB"): If you do not specify ' B ' tags when manipulating binaries, you may encounter some strange problems, including bad picture files and strange questions about the \ r \ n characters.
Note: For portability reasons, it is strongly recommended that you always use the ' B ' flag when you open a file with fopen ().
Note: Again, for transplant considerations, it is strongly recommended that you rewrite the code that relies on the ' t ' pattern to use the correct line terminator and change it to ' B ' mode.
4,strtolower--Make a string lowercase
5,curl_init (): Curl_init--Initialize A Curl session (initialize a Curl conversation)
Resource Curl_init ([string URL])
Initializes a new session and return a CURL handle for use with the curl_setopt (), curl_exec (), and curl_close () functions .
Url--if provided, the CURLOPT_URL option is set to its value. You can manually set this using the curl_setopt () function.
Returns a CURL handle on success and FALSE on errors.
6,curl_setopt--Set an option for a curl transfer (provide settings)
BOOL Curl_setopt (resource ch, int option, mixed value)
Sets an option on the given CURL session handle. (See the PHP Manual for details) There:
Curlopt_url:the URL to fetch. You can also set this when initializing a sessions with Curl_init ().
Curlopt_connecttimeout:the number of seconds to whilst trying to connect. Use 0 to wait indefinitely. (indefinite wait set to 0)
Curlopt_returntransfer:true to return the transfer as a string, the return value of curl_exec () instead of outputting I T out directly.
Curlopt_failonerror:true to fail silently if the HTTP code returned are greater than or equal to 400. The default behavior is to return the page normally, ignoring the code.
Curlopt_useragent:the contents of the "User-agent:" header to is used in a HTTP request.
7,curl_exec:perform A Curl session, this function should is called after you initialize a Curl sessions and all optio NS for the session are set.
Returns TRUE if successful, and returns FALSE if it fails. However, if the Curlopt_returntransfer option is set, it'll return the result of success, FALSE on Failure
8,curl_close--Close a Curl session

Here are some reference codes:
PHP Acquisition Program Common functions
PHP captures the contents of the specified URL