PHP uses CI to implement URL permission control with hooks

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"> The CI hook function allows you to change or add the system's core running functions without modifying the system's core files.

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For example, you can trigger your script before or after the controller is loaded, or at other times.

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"> Check the code:

 
 
Add the hook statement to system/application/config/hooks. php:
[Php]

$ Hook ['post _ controller_constructor '] = array (
'Class' => 'acl ',
'Function' => 'filter ',
'Filename' => 'acl. php ',
'Filepath' => 'Hooks ',
);
 
Make the hook system take effect in system/application/config. php

$ Config ['enable _ Hooks'] = TRUE;
 
Then, create the acl. php permission system configuration file in. of course, you can also put it in the database.
 

// Visitor permission ing
$ Config ['acl'] ['visitor '] = array (
''=> Array ('index'), // homepage www.2cto.com
'Music' => array ('index', 'list '),
'User' => array ('index', 'login', 'register ')
);
// Administrator
$ Config ['acl'] ['admin'] = array (

);

// ------------- Prompt message about insufficient permission configuration and jump url ------------------//
$ Config ['acl _ info'] ['visitor '] = array (
'Info' => 'login required to continue ',
'Return _ url' => 'User/login'
);

$ Config ['acl _ info'] ['more _ role'] = array (
'Info' => 'requires higher permissions to continue ',
'Return _ url' => 'User/up'
);

/* End of file acl. php */
/* Location:./application/config/acl. php */
 
Add the acl. php logical processing file under the system/application/hooks Directory
 

Class Acl
{
Private $ url_model; // The Accessed module, such as music.
Private $ url_method; // The Accessed method, for example, create
Private $ url_param; // The url parameter may be 1 or id = 1 & name = test
Private $ CI;

Function Acl ()
{
$ This-> CI = & get_instance ();
$ This-> CI-> load-> library ('session ');

$ Url = $ _ SERVER ['php _ SELF '];
$ Arr = explode ('/', $ url );
$ Arr = array_slice ($ arr, array_search ('index. php', $ arr) + 1, count ($ arr ));
$ This-> url_model = isset ($ arr [0])? $ Arr [0]: '';
$ This-> url_method = isset ($ arr [1])? $ Arr [1]: 'index ';
$ This-> url_param = isset ($ arr [2])? $ Arr [2]: '';
}

Function filter ()
{
$ User = $ this-> CI-> session-> userdata ('user ');
If (emptyempty ($ user) {// visitor
$ Role_name = 'visitor ';
} Else {
$ Role_name = $ user-> role;
}

$ This-> CI-> load-> config ('acl ');
$ Acl = $ this-> CI-> config-> item ('acl ');
$ Role = $ acl [$ role_name];
$ Acl_info = $ this-> CI-> config-> item ('acl _ info ');

If (array_key_exists ($ this-> url_model, $ role) & in_array ($ this-> url_method, $ role [$ this-> url_model]) {
;
} Else {// no permission, prompt, jump url
$ This-> CI-> session-> set_flashdata ('info', $ acl_info [$ role_name] ['info']);
Redirect ($ acl_info [$ role_name] ['return _ url']);
}
}
}

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