如何在PHP中安装MySQL模块？

Question

I've updated php.ini and moved php_mysql.dll as explained in steps 6 and 8 here.

I get this error…

Fatal error: Call to undefined function mysql_connect() in C:\inetpub...

MySQL doesn't show up in my phpinfo; report.

---

I've updated the c:\\Windows\\php.ini file from

; Directory in which the loadable extensions (modules) reside.  
extension_dir = "./"

to

; Directory in which the loadable extensions (modules) reside.  
extension_dir = ".;c:\Windows\System32"

Result: no change.

---

I changed the php.ini value of extension_dir thusly:

extension_dir = "C:\Windows\System32"

Result: much more in the phpinfo; report, but MySQL still isn't working.

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I copied the file libmysql.dll from folder C:\\php to folders C:\\Windows\\System32 and C:\\Windows

Result: no change.

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I stopped and restarted IIS .

Result: new, different errors instead!

Warning: mysql_connect() [function.mysql-connect]: Access denied for  
user '...'@'localhost' (using password: YES) in C:\inetpub\...
error in query.

Fatal error: Call to a member function RecordCount() on a non-object  
in C:\inetpub\...

---

I found several .php files in the website where I had to set variables:

$db_user  
$db_pass

Result: The site works!

Answer 1

As the others say these two values in php.ini are crucial.

I have the following in my php.ini: note the trailing slash - not sure if it is needed - but it does work.

extension_dir = "H:\apps\php\ext\"
extension=php_mysql.dll

Also it is worth ensuring that you only have one copy of php.ini on your machine - I've had problems with this where I've been editting a php.ini file which php isn't using and getting very frustrated until I realised.

Also if php is running as a module within apache you will need to restart the apache server to pickup the changes. Wise to do this in anycase if you're not sure.

a "php -m" from the cmd prompt will show you the modules that are loaded from the ini file.

Answer 2

在php.ini文件中，检查扩展路径配置是否有效。

Answer 3

You will need to enable the extension=php_mysql.dll option in the php.ini as well. Also, make sure that the file is in the extension_dir you set.

You can read more about it at:

http://us3.php.net/manual/en/install.windows.extensions.php

Answer 4

On a completely different note, might I suggest WampServer ? It should get you up and running with a Apache/PHP/MySQL install in no time.

You could even compare the WampServer config files with your own to see where you originally went wrong.