Php code used to obtain the webpage request status

Many webmasters will check whether their website status code is 200 or the error page code is 404. The most common way to view the code is to use webmasters or ff browsers, but a lot of friends don't know how to write a status code by themselves...

Many webmasters will check whether their website status code is 200 or the error page code is 404. The most common way to view the code is to use webmasters or ff browsers, however, many users do not know that they can write a function to view status code.

Method 1: Use fsockopen to seriously despise curl_getinfo. the code is as follows:

1. Function get_http_code ($ url = "localhost", $ port = 80, $ fsock_timeout = 10 ){
2. Set_time_limit (0 );
3. Ignore_user_abort (true );
4.  
5. // Record start time
6. List ($ usec, $ sec) = explode ("", microtime (true ));
7. $ Timer ['start'] = (float) $ usec + (float) $ sec;
8.  
9. // Verify the URL
10. If (! Preg_match ("/^ https? : \/\ // I ", $ url )){
11. $ Url = "http: //". $ url;
12. }
13. // Supports HTTPS
14. If (preg_match ("/^ https: \// I", $ url )){
15. $ Port = 443;
16. }
17.  
18. // Parse the URL
19. $ Urlinfo = parse_url ($ url );
20. If (emptyempty ($ urlinfo ['path']) {
21. $ Urlinfo ['path'] = '/';
22. }
23. $ Host = $ urlinfo ['host'];
24. $ Uri = $ urlinfo ['path']. (emptyempty ($ urlinfo ['query'])? '': $ Urlinfo ['query']);
25.  
26. // Open the connection through fsock
27. If (! $ Fp = fsockopen ($ host, $ port, $ errno, $ error, $ fsock_timeout )){
28. List ($ usec, $ sec) = explode ("", microtime (true ));
29. $ Timer ['end'] = (float) $ usec + (float) $ sec;
30. $ Usetime = (float) $ timer ['end']-(float) $ timer ['start'];
31.  
32. Return array ('code' =>-1, 'usetime' => $ usetime );
33. }
34.  
35. // Submit the request
36. $ Status = socket_get_status ($ fp );
37. $ Out = "GET {$ uri} HTTP/1.1 \ r \ n ";
38. $ Out. = "Host: {$ host} \ r \ n ";
39. $ Out. = "Connection: Close \ r \ n ";
40. $ Write = fwrite ($ fp, $ out );
41. If (! $ Write ){
42. List ($ usec, $ sec) = explode ("", microtime (true ));
43. $ Timer ['end'] = (float) $ usec + (float) $ sec;
44. $ Usetime = (float) $ timer ['end']-(float) $ timer ['start'];
45.  
46. Return array ('code' =>-2, 'usetime' => $ usetime );
47. }
48.  
49. $ Ret = fgets ($ fp, 1024 );
50. Preg_match ("/http \/\ d \. \ d \ s (\ d +)/I", $ ret, $ m );
51. $ Code = $ m [1];
52. Fclose ($ fp );
53.  
54. List ($ usec, $ sec) = explode ("", microtime (true ));
55. $ Timer ['end'] = (float) $ usec + (float) $ sec;
56. $ Usetime = (float) $ timer ['end']-(float) $ timer ['start'];
57.  
58. Return array ('code' => $ code, 'usetime' => $ usetime );
59. }

File_get_contents is a simple package of the fsockopen function, which is less efficient, but the capture success rate is very high. so I usually come here when snoopy goes wrong. 5.0.0 adds support for context. with context, it can also send header information, custom user agent, referer, and cookies. 5.1.0 added the offset and maxlen parameters to read only part of the file.

Method 2: Use snoopy. class. php

Snoopy is a php class used to simulate browser functions. it can obtain webpage content and send forms. the code is as follows:

1. $ Ch = curl_init ();
2. Curl_setopt ($ ch, CURLOPT_URL, 'http: // www.spiegel.de /');
3. Curl_setopt ($ ch, CURLOPT_RANGE, '0-500 ');
4. Curl_setopt ($ ch, CURLOPT_BINARYTRANSFER, 1 );
5. Curl_setopt ($ ch, CURLOPT_RETURNTRANSFER, 1 );
6. $ Result = curl_exec ($ ch );
7. Curl_close ($ ch );
8. Echo $ result;
9. /**
10. * But as noted before if the server doesn't honor this header but sends the whole file curl will download all of it. e. g. http://www.111cn.net ignores the header. but you can (in addition) set a write function callback and abort the request when more data is stored ed, e.g.
11. * Php 5.3 + only
12. * Use function writefn ($ ch, $ chunk) {...} for earlier versions
13. */
14. $ Writefn = function ($ ch, $ chunk ){
15. Static $ data = '';
16. Static $ limit = 500; // 500 bytes, it's only a test
17. $ Len = strlen ($ data) + strlen ($ chunk );
18. If ($ len >=$ limit ){
19. $ Data. = substr ($ chunk, 0, $ limit-strlen ($ data ));
20. Echo strlen ($ data), '', $ data;
21. Return-1;
22. }
23. $ Data. = $ chunk;
24. Return strlen ($ chunk );
25. };
26. $ Ch = curl_init ();
27. Curl_setopt ($ ch, CURLOPT_URL, 'http: // www.111cn.net /');
28. Curl_setopt ($ ch, CURLOPT_RANGE, '0-500 ');
29. Curl_setopt ($ ch, CURLOPT_BINARYTRANSFER, 1 );
30. Curl_setopt ($ ch, CURLOPT_WRITEFUNCTION, $ writefn );
31. $ Result = curl_exec ($ ch );
32. Curl_close ($ ch );

Some common status codes are:

200-the server returns the webpage successfully

404-the requested webpage does not exist

503-server timeout

301-page redirection