Use php to implement basic identity authentication. you can create a basic authentication mechanism by combining the header () function with the $ PHP_AUTH_USER and $ PHP_AUTH_PW global variables. Generally, the server-based authentication request/response process is as follows: use php to implement basic identity authentication. you can combine header () function and $ PHP_AUTH_USER and $ PHP_AUTH_PW global variables to create a basic authentication mechanism. Generally, the server-based authentication request/response process is as follows:
1. the user requests a file from a Web server. If the file is in a protected area, the server adds a 401 (invalid user) string to the response data header as a response.
2. the user name/password dialog box is displayed after the browser sees the response.
3. enter the user name and password in the dialog box, and click "OK" to send the information back to the server for authentication.
4. if the user name and password are valid, the protected file will be displayed to the user. This validation will continue to be valid for the duration of the verified user in the protected area.
A simple PHP script can simulate the HTTP authentication request/response system by sending an appropriate HTTP header to automatically display the username/password dialog box on the client screen. PHP stores the user input dialog box information in the $ PHP_AUTH_USER and $ PHP_AUTH_PW variables. By using these variables, you can store a list that does not comply with the user name/password test to a text file, database, or wherever you want.
Note: The global variables $ PHP_AUTH_USER, $ PHP_AUTH_PW, and $ PHP_AUTH_TYPE are valid only when PHP is installed as a module. If you are using the CGI version of PHP, you will be limited to using htaccess-based or database-based authentication methods. you can enter the user name and password through the HTML form, and then let PHP check the validity.
This example shows a confirmation check for the two hardware encoding values, regardless of where the user name and password are stored, which is theoretically identical.
// Check the values of $ PHP_AUTH_USER and $ PHP_AUTH_PW.
If ((! Isset ($ PHP_AUTH_USER) | (! Isset ($ PHP_AUTH_PW ))){
// Null value: send the data header that generates the display text box
Header ('www-Authenticate: Basic realm = "My Private Stuff "');
Header ('http/1.0 401 unauthorized ');
Echo 'authorization Required .';
Exit;
}
Else if (isset ($ PHP_AUTH_USER) & (isset ($ PHP_AUTH_PW ))){
// Check whether the variable value exists.
If ($ PHP_AUTH_USER! = "Username") | ($ PHP_AUTH_PW! = "Password ")){
// User name input error or password input error, send the data header that generates the display text box
Header ('www-Authenticate: Basic realm = "My Private Stuff "');
Header ('http/1.0 401 unauthorized ');
Echo 'authorization Required .';
Exit;
}
Else if ($ PHP_AUTH_USER = "username") | ($ PHP_AUTH_PW = "password ")){
// The user name and password are correct and the success information is output.
Echo"You're authorized! ";
}
}
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