Example of four URL parsing methods in PHP

When URL parameters are known, we can use $ _ GET to obtain the relevant parameter information ($ _ GET [\\\ name \\]) According to our own situation. how can we get the parameter information on the URL in an unknown situation? First, use the $ _ SERVER built-in array variable.

When URL parameters are known, we can use $ _ GET to obtain the relevant parameter information ($ _ GET [\ 'name \ ']) based on our own situation. how can we get the parameter information on the URL in an unknown situation?

First: use the $ _ SERVER built-in array variable

Obtain the URL parameter from the original $ _ SERVER ['query _ string']. Generally, this variable returns data similar to this: name = tank & sex = 1.

To include a file name, you can use $ _ SERVER ["REQUEST_URI"] (The Returned result is similar to:/index. php? Name = tank & sex = 1)

Second: use pathinfo built-in functions

2. $ Test = pathinfo ("http: // localhost/index. php ");
3. Print_r ($ test );
4. /*
5. The result is as follows:
6. Array
7. (
8. [Dirname] => http: // localhost // url path
9. [Basename] => index. php // Complete file name
10. [Extension] => php // file name suffix
11. [Filename] => index // file name
12. )
13. */
14. ?>

Third: use the parse_url built-in function

2. $ Test = parse_url ("http: // localhost/index. php? Name = tank & sex = 1 # top ");
3. Print_r ($ test );
4. /*
5. The result is as follows:
6. Array
7. (
8. [Scheme] => http // what protocol is used
9. [Host] => localhost // host name
10. [Path] =>/index. php // path
11. [Query] => name = tank & sex = 1 // The passed parameter
12. [Fragment] => top // The anchor behind the root
13. )
14. */
15. ?>

Type 4: Use the basename built-in function

2. $ Test = basename ("http: // localhost/index. php? Name = tank & sex = 1 # top ");
3. Echo $ test;
4. /*
5. The result is as follows:
6. Index. php? Name = tank & sex = 1 # top
7. */
8. ?>

In addition, you can use the regular expression matching method to obtain the required value. this method is more precise and the efficiency is not considered for the moment. below we will expand the regular expression processing method in practice:

2. Preg_match_all ("/(\ w + = \ w +) (# \ w + )? /I "," http: // localhost/index. php? Name = tank & sex = 1 # top ", $ match );
3. Print_r ($ match );
4. /*
5. The result is as follows:
6. Array
7. (
8. [0] => Array
9. (
10. [0] => name = tank
11. [1] => sex = 1 # top
12. )
13. [1] => Array
14. (
15. [0] => name = tank
16. [1] => sex = 1
17. )
18. [2] => Array
19. (
20. [0] =>
21. [1] => # top
22. )
23. )
24. */
25. ?>