phpMyAdmin installation and problem summary_PHP tutorial-PHP Tutorial-php.cn

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 added phpMyAdmin2.11.5.1 by the way. The configuration steps are also listed below; in order to facilitate switching and debugging PHP, I use the Windows system for local debugging.
1. First download the phpMyAdmin installation package:
Go to the official foreign website http://www.phpmyadmin.net, click the "DOWNLOADS" link on the navigation bar to enter the download page, and select "all-languages.zip" Download the version locally and decompress it; 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 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 http at the beginning.
4. Search for $cfg['Servers'][$i]['host'] = 'localhost'; (usually the default is used, there are exceptions, so no 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, here since we have added the URL before, 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 , the virtual host provider will tell you; generally do not modify it)
7. Find $cfg['Servers'][$i]['password'] = '123456'; // MySQL password (change 123456 to connect you The user password of the MYSQL database)
8. Find $cfg['DefaultLang'] = 'zh'; (Here is the language selection, zh means Simplified Chinese) and $cfg['DefaultCharset'] = 'gb2312 '; (Change the default encoding to the 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 not within 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. question.
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 service 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 Web services.
3. In the php.ini file in the PHP directory, the first ";" in ";extension=php_mcrypt.dll" is not removed, so the corresponding function cannot be used. The solution is to open the php.ini file. Find;extension=php_mcrypt.dll and change it 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 and run
delete all other user permissions (can also be retained, but the security is not high, it is recommended to delete), and then restart the MYsql service and Web service (it is recommended to restart after modifying this item) server).
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 (whichever directory your PHP is in)
Second question: "The configuration file now requires a top-secret phrase password (blowfish_secret)"
Make sure that the correct settings are made in the config.default.php file Settings:
$cfg['Servers'][$i]['auth_type'] = 'cookie';
Also
$cfg['blowfish_secret'] = 'www.blog.com'; //(Write this value as you like, just don’t leave it blank)
Actually, I was really depressed when I encountered this problem. If I follow the configuration method I mentioned above, this error should not be prompted. After more than 2 hours of constant modification of the config.default.php configuration file, I kept getting this error, which was almost on the verge of collapse.
Then I suddenly had an idea: 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? What other configuration files influence 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 file. The configuration file in the folder, this problem, I have been struggling with it 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 that arise:
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)
Open phpmyadmin and the following error appears:
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, set it to session.save_path = "C:/php/tmp" and remove the semicolon. OK
The information I found on the Internet was not correct, and those people thought it was a problem with extension=php_mbstring.dll! ! !