ThinkPHP C function implementation principle

Q: The C function of ThinkPHP is used to obtain configuration parameters. I want to know how to obtain the parameters in the configuration file? FunctionC ($ namenull, $ valuenull) {static $ _ configarra...

Q: The C function of ThinkPHP is used to obtain configuration parameters. I want to know how to obtain the parameters in the configuration file?

1. Function C ($ name = null, $ value = null)
2. {
3. Static $ _ config = array ();
4. // Obtain all
5. If (emptyempty ($ name) return $ _ config;
6. // Get or assign values to the settings
7. If (is_string ($ name ))
8. {
9. If (! Strpos ($ name ,'.')){
10. $ Name = strtolower ($ name );
11. If (is_null ($ value ))
12. Return isset ($ _ config [$ name])? $ _ Config [$ name]: null;
13. $ _ Config [$ name] = $ value;
14. Return;
15. }
16. // Two-dimensional array settings and retrieval support
17. $ Name = explode ('.', $ name );
18. $ Name [0] = strtolower ($ name [0]);
19. If (is_null ($ value ))
20. Return isset ($ _ config [$ name [0] [$ name [1])? $ _ Config [$ name [0] [$ name [1]: null;
21. $ _ Config [$ name [0] [$ name [1] = $ value;
22. Return;
23. }
24. // Batch settings
25. If (is_array ($ name ))
26. Return $ _ config = array_merge ($ _ config, array_change_key_case ($ name ));
27. Return null; // avoid invalid parameters
28. }
29. Some parameters are as follows:
30. Return array (
31.  
32.  
33. 'App _ debug' => false, // whether to enable the debugging mode
34. 'App _ DOMAIN_DEPLOY '=> false, // whether to deploy the project with an independent domain name
35. 'App _ PLUGIN_ON '=> false, // whether to enable the plug-in mechanism
36. 'App _ FILE_CASE '=> false, // check whether the file is case-sensitive for Windows platforms
37. 'App _ GROUP_DEPR '=>'. ', // delimiter between group modules
38. 'App _ GROUP_LIST '=> '', // project grouping settings. multiple groups are separated by commas (,), for example, 'Home, admin'
39. 'App _ AUTOLOAD_REG '=> false, // whether to enable SPL_AUTOLOAD_REGISTER
40. 'App _ AUTOLOAD_PATH '=> 'Think. Util.', // _ autoLoad mechanism for additional detection path settings, pay attention to the search order
41. 'App _ CONFIG_LIST '=> array ('taglibs', 'Routes', 'tags', 'htmls', 'modules', 'actions '), // the configuration list to be loaded for the project. the default options include taglibs (tag library definition), routes (Route definition), tags (tag definition), and htmls static cache definition, modules and actions)
42. )

A: This is actually not the problem domain of ThinkPHP. it is the basic knowledge of PHP.

1. as shown in the following figure, config. php directly returns a configuration item array.

1. Return array (
2.  
3.  
4. 'App _ debug' => false, // whether to enable the debugging mode
5. 'App _ DOMAIN_DEPLOY '=> false, // whether to deploy the project with an independent domain name
6. 'App _ PLUGIN_ON '=> false, // whether to enable the plug-in mechanism
7. 'App _ FILE_CASE '=> false, // check whether the file is case-sensitive for Windows platforms
8. 'App _ GROUP_DEPR '=>'. ', // delimiter between group modules
9. 'App _ GROUP_LIST '=> '', // project grouping settings. multiple groups are separated by commas (,), for example, 'Home, admin'
10. 'App _ AUTOLOAD_REG '=> false, // whether to enable SPL_AUTOLOAD_REGISTER
11. 'App _ AUTOLOAD_PATH '=> 'Think. Util.', // _ autoLoad mechanism for additional detection path settings, pay attention to the search order
12. 'App _ CONFIG_LIST '=> array ('taglibs', 'Routes', 'tags', 'htmls', 'modules', 'actions '), // the configuration list to be loaded for the project. the default options include taglibs (tag library definition), routes (Route definition), tags (tag definition), and htmls static cache definition, modules and actions)
13. )

2. you can use $ config = require ("config. php"); to obtain the configuration array, which is simple!

For require, as the name implies, it is used to contain files, corresponding include, and two with once. generally, it includes success return 1, including failure return false,, if return is used in the included file, this value is the return value.