PHP correct configuration of mysql detailed tutorial_PHP tutorial

php can be combined with apache normally, and common errors such as: PHP Warning: PHP Startup: Unable to load dynamic library..., Fatal error: Call to undefined function mysql_connect()

But I am making one today There was still an unforgivable error in the CMS, and mysql could not be connected. I wrote a php file to test mysql as follows:

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$link=mysql_connect('localhost','root','root'); if(!$link) echo "失败!"; else echo "成功!"; mysql_close(); ?>

The result is an error: Fatal error: Call to undefined function mysql_connect(). It is obvious that the corresponding library for mysql cannot be found. Baidu has a lot of them. What is the copy of the mysql lib library and the copy to the system32 directory of windows? , too complicated. In fact, the correct configuration should be to add the following settings to the httpd.conf file of apache:

The code is as follows

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LoadModule php5_module d:/tools/php-5.3.1/php5apache2_2.dll AddType application/x-httpd-php .php PHPIniDir d:/tools/php-5.3.1

LoadModule php5_module d:/tools/php-5.3.1/php5apache2_2.dll

AddType application/x-httpd-php .php

PHPIniDir d:/tools/php-5.3.1 

Note that the last line is the key, telling apache where your php configuration file is, otherwise you have to copy the php.ini file to the windows system directory. Generally, we can complete the combination of apache and php through configuration here. In the php.ini file, you only need to modify the following places:

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extension_dir = "D:/tools/php-5.3.1/ext"

# Modify the php extension library directory to your actual path

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extension=php_mysql.dll

# Remove the preceding;

The last step is to add your PHP installation path to the system environment variable (note that it is a system environment variable, not a user environment variable) path. After the setting is successful, you should be able to add the path in the Apache Environment section through phpinfo() You can see your PHP installation directory, otherwise the environment variables are not configured successfully (note, restart apache after configuring the environment variables).

After completing these steps, you can connect to the database correctly, but the premise is that the integration of your apache and php is normal, and then consider this mysql configuration. If the effect is not achieved, you can question me, haha!

In summary, the correct configuration steps for integrating apache and php (including mysql) under the windows platform are as follows:

1. Install apache and ensure that apache can run normally alone

2. Unzip the zip package of php (such as 5.2.17 or 5.3.1) to a directory, such as D:php-5.3.1

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# php5 supportLoadModule php5_module D:/php-5.3.1/php5apache2_2.dll

3. Add the following paragraph at the end of apache’s httpd.conf file:

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AddType application/x-httpd-php .php

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PHPIniDir D:/php-5.3.14

, add the D:/php-5.3.1 path to the path of the operating system's environment variable (must be a system variable rather than a user variable)

5. Rename php.ini-dist in the php installation directory to php.ini, and modify the following content:

# Set the php extension file directory

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extension_dir = "D:/php-5.3.17/ext"

# Enable mysql extension and remove the previous; comment

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extension=php_mysql.dll

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