phpmyadmin phpMyAdmin installation and problem summary

1/Unable to load the mcrypt extension, please check the PHP configuration;
2/The configuration file now requires a top-secret phrase password (blowfish_secret);
3/#2003-The server is not responding.
Since the latest version of phpMyAdmin has been updated to 2.11.5.1, many configuration methods circulated on the Internet are from the old version and are no longer suitable for the configuration requirements of the new version; so flymorn also provides the configuration steps for phpMyAdmin2.11.5.1 It is also listed below; in order to facilitate switching and debugging PHP, I use the windows system and debug locally.
1. Download the phpMyAdmin installation package first:
Go to the official foreign website http://www.phpmyadmin.net, click the "DOWNLOADS" link on the navigation bar to enter the download page, select the "all-languages.zip" version to download locally , decompress; put the decompressed file into the phpmyadmin folder in the virtual root directory specified by the system (the folder name can be customized). For example, the local storage location of flymorn is D: wwwphpmyadmin.
2. Find the /libraries/config.default.php file in the phpmyadmin folder (the old version is the config.inc.php file in the root directory), and open it for editing with a WordPad that supports UTF-8 encoding.
3. Find $cfg['PmaAbsoluteUri']
Change it to the URL of phpMyAdmin that you will upload to the space
For example: $cfg['PmaAbsoluteUri'] = 'http://www.piaoyi.org/phpmyadmin/';
Because I am debugging locally, I changed it to $cfg['PmaAbsoluteUri'] = 'http://localhost/phpmyadmin/';
Note: Don't miss the last backslash/ and the beginning http.
4. Search for $cfg['Servers'][$i]['host'] = 'localhost'; (Usually use the default, there are exceptions, and you don’t need to modify it)
5. Search for $cfg['Servers'][$ i]['auth_type'] = 'config';
Use config for debugging on your own machine; if you use cookies in the network space, since we have added the URL before, we will change it to cookies.
My personal suggestion: Whether it is local or online, it is recommended to set cookies, safety first.
At the same time, when the auth_type value is set to cookie, there is another place that needs to be modified:
$cfg['blowfish_secret'] = '';
Change to: $cfg['blowfish_secret'] = 'www.blog .com;
The www.blog.com here can be defined by yourself, no more than 46 characters. If this field is left blank, the second error mentioned above will appear: "The configuration file now requires a top-secret phrase password (blowfish_secret)".
6. Search $cfg['Servers'][$i]['user'] = 'root'; // MySQL user (user name, use root on your machine; on the Internet, it is usually your ftp user name, virtual The hosting provider will tell you; generally do not modify it)
7. Find $cfg['Servers'][$i]['password'] = '123456'; // MySQL password (modify 123456 to connect to your MYSQL database) User password)
8. Find $cfg['DefaultLang'] = 'zh'; (Here is the language selection, zh represents Simplified Chinese) and $cfg['DefaultCharset'] = 'gb2312'; (modify the default encoding (National Standard)
At this point, phpMyAdmin has been configured OK; you can open http://localhost/phpmyadmin/ to access the convenient and fast graphical management software phpMyAdmin. Regarding other options in the configuration file not mentioned in this article, you don’t need to worry about it or modify it. The specific how to operate phpMyAdmin is beyond the scope of this article, but the graphical interface is easy to understand and you will be able to use it after just a few glances.
Let’s talk about the three problems encountered by flymorn during the installation and configuration of phpMyAdmin.
First question: "Unable to load mcrypt extension, please check PHP configuration".
1. The Mysql database is not installed correctly, and the Mysql-related services in the system services are not started.
2. The libmcrypt.dll file is missing in the system’s system32 (C:windowssystem32) directory. The solution is to find libmcrypt.dll in the php directory, copy libmcrypt.dll to the C:windowssystem32 directory, and then restart the web service. .
3. In the php.ini file in the PHP directory, the previous ";" in ";extension=php_mcrypt.dll" has not been removed, so the corresponding function cannot be used. The solution is to open the php.ini file and find; extension=php_mcrypt.dll changed to extension=php_mcrypt.dll //Remove the previous; to make it effective
4. The Mysql directory does not have read permissions. The correct directory permissions are as follows:
administrator full control
system full control
user read plus Run
Delete all other user permissions (you can also keep them, but the security is not high, it is recommended to delete them), and then restart the MYsql service and Web service (it is recommended to restart the server after modifying this).
5. If none of the above methods work, use this method: Desktop>My Computer>Right-click Properties>Advanced>Environment Variables>System Variables>New
Name: phpdir
Value: C:php(you The PHP is in whatever directory it is in)
Second question: "The configuration file now requires a top-secret phrase password (blowfish_secret)"
Make sure the correct settings are made in the config.default.php file:
$cfg['Servers' ][$i]['auth_type']= 'cookie';
At the same time
$cfg['blowfish_secret'] = 'www.blog.com'; // (Write this value as you like, but cannot leave it blank)
In fact, this I was really frustrated when I encountered this problem. If I followed the configuration method I mentioned above, this error should not be prompted. After I kept modifying the config.default.php configuration file for more than 2 hours, this error was always prompted, almost reaching the edge of collapse.
Then I had an idea and suddenly discovered: I changed the auth_type authentication method to http, and when I changed it to config, this error always appeared when I opened the page. In other words, changing the authentication mode did not affect phpmyadmin. Could it be something else? Configuration files influence the decision of phpmyadmin?
I immediately came to the root directory of phpmyadmin, and I was surprised to find that while there was a config.sample.inc.php file in the root directory, there was also a file config.inc.php that also existed! ! And this is the configuration file of the previous old version. It turns out that this file is the trouble. Delete config.inc.php immediately, enter the debugging page again, and the error disappears! problem solved.
It seems that the config.inc.php configuration file in the phpmyadmin root directory has a higher priority than the /libraries/config.default.php configuration file. The system calls the configuration file in the root directory first, and then the libraries folder. Configuration file, this problem has been bothering me for so long, it’s a shame. It's finally solved, let me breathe a sigh of relief.
Third question: "#2003-Server not responding".
When encountering this problem, it is most likely that the MYSQL database has not been started. It is recommended to start MYSQL directly in: Control Panel-Administrative Tools-Services. Regarding whether to start, you can check whether there is a process such as "mysqld-nt.exe" in the task manager. If there is, it means that mysql has been started.
Just don’t encounter these problems. But for novices, like me, when they encounter it for the first time, they usually look everywhere for solutions. When a lot of methods on the Internet are not applicable, they will feel so helpless. I still suggest that you don’t be anxious when you encounter problems, read the documentation carefully, and refer to the solutions of your predecessors. Although they may not be used, they will be inspiring to you. Practice more and experiment more, no problem can stump you, I am optimistic about you^__^
Problems:
Cannot start session without errors, please check errors given in your PHP and/or webserver log file and configure your PHP installation properly.
Change the value of session.auto_start in php.ini to 1 (start), the default is 0 (disable)
The following error appears when opening phpmyadmin:
Cannot start session without errors, please check errors given in your PHP and /or webserver log file and configure your PHP installation properly.
And other program connections are normal, the environment is 2003 II6
Create a folder tmp in the php directory
Find the session.save_path line in php.ini and set it to session. save_path = "C:/php/tmp" remove the semicolon. OK
The information I found on the Internet was not correct. Those people thought it was a problem with extension=php_mbstring.dll! ! !

The above introduces the installation and problem summary of phpmyadmin phpMyAdmin, including the content of phpmyadmin. I hope it will be helpful to friends who are interested in PHP tutorials.