PHP code for obtaining remote webpage content (fopen, curl tested ). 1. the code for copying fopen code is as follows :? Php $ handlefopen (s.jb51.net, rb); $ contents; while (! Feof ($ handle) {$ contents. fread ($ handle, 8192);} fclos
1. Use of fopen
The code is as follows:
$ Handle = fopen ("http://s.jb51.net/", "rb ");
$ Contents = "";
While (! Feof ($ handle )){
$ Contents. = fread ($ handle, 8192 );
}
Fclose ($ handle );
Echo $ contents; // output the obtained content.
?>
The code is as follows:
// The following code can be used for PHP 5 and later versions:
$ Handle = fopen ("http://s.jb51.net", "rb ");
$ Contents = stream_get_contents ($ handle );
Fclose ($ handle );
Echo $ contents;
?>
However, the above code is prone to failed to open stream: HTTP request failed! Error. Solution
Some people say that in php. in ini, there are two options: allow_url_fopen = on (indicating that remote files can be opened through url), user_agent = "PHP" (indicating which script is used to access the network. by default, there is "; "remove it .) Restart the server.
However, some of them still have this warning message. if you want to use the perfect solution, you still have to set php. user_agent in ini. the default user_agent in php is PHP. we can change it to Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) to simulate the browser.
User_agent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0 )"
If you encounter this problem at work and solve it perfectly, share it with you.
2. implemented through curl
The code is as follows:
$ Url = "http://s.jb51.net ";
$ Ch = curl_init ();
Curl_setopt ($ ch, CURLOPT_URL, $ url );
Curl_setopt ($ ch, CURLOPT_RETURNTRANSFER, 1 );
Curl_setopt ($ ch, CURLOPT_CONNECTTIMEOUT, 10 );
$ Dxycontent = curl_exec ($ ch );
Echo $ dxycontent;
?>
In linux, you can download the following code:
Exec ("wget {$ url }");
Difference between the function fopen/file_get_contents/curl for PHP to capture external resources
Fopen/file_get_contents performs a new DNS query every time a request is sent, and the DNS information is not cached.
However, CURL automatically caches DNS information. Only one DNS query is required for a webpage or image request under the same domain name.
This greatly reduces the number of DNS queries.
Therefore, CURL performance is much better than fopen/file_get_contents.
The original content of the script home. For more information, see the source.
The pipeline code is as follows :? Php $ handle = fopen ("http://s.jb51.net/", "rb"); $ contents = ""; while (! Feof ($ handle) {$ contents. = fread ($ handle, 8192);} fclos...
