8 Tips for PHP Scripting (1)_PHP Tutorial

Install PHP as Apache DSO

PHP is often used on Linux/Unix platforms together with the Apache web server. When we install PHP in the Apache environment, you have three installation modes to choose from: static module, dynamic module (DSO) and CGI.

I suggest you install PHP as Apache's DSO. The maintenance and upgrade of this installation mode are quite simple. For example, suppose you originally installed only PHP's database support. But a few days later you decide to add encryption functionality to PHP. It's very simple, you just type the make clean command, then add new configuration options, and then execute the make and make install commands. In this way, the new PHP module will be installed in the appropriate location on Apache. You only need to restart Apache and everything will be OK. Of course, the whole process does not require recompiling Apache.

The simple steps to install a new version of Apache and install PHP as an Apache DSO are as follows:

1. Download the latest version of the source code of the Apache server software from the Apache Software Foundation website.
2. Place the code files in a suitable directory such as /usr/local/ or /opt/.
3. Use the Gunzip command to decompress the code file, and then you can get the corresponding *.tar file.
4. Type the following unpacking command to put the above tar file into the directory in the shape of apache_[version]:

tar -xvf apache_[version].tar

5. Go to the /usr/local/apache_[version] directory (or the directory you specified in the above step).
6. Type the following configuration command, replace the [path] parameter with the path you set (such as /usr/local/apache[version], etc., be careful not to follow it with a slash!), and you also need to enable mod_so Parameters to allow Apache to use DSO.

./configure --prefix=[path] --enable-module=so

7. Return to the command prompt, type the make command and wait for the command execution to complete and return to the command prompt again.
8. Type make install.

At this point, the compiler can create the final directory and return to the system's command prompt.

Next install PHP:

1. Visit the download area of ​​the PHP homepage and select the link to the latest version of the source code.
2. Place the downloaded file in an appropriate directory such as /usr/local/ or /opt/.
3. Use the Gunzip command to decompress the code file, and then you can get the corresponding *.tar file.
4. Type the following unpacking command to put the above tar file into a directory in the shape of php-[version]:

tar -xvf php-[version]

5. Go to the /usr/local/php-[version] directory (or the directory you specify).

Now you can compile PHP DSO. In fact, you only need one necessary configuration option--with-apxs (a file in the Apache bin directory)--however, in order to make the system configuration more comprehensive, we have also added here Support for MySQL database.

./configure --with-mysql=/[path to mysql] --with-apxs=/[path to apxs]

6. Return to the command prompt, type the make command and wait until the command execution is completed and return to the command prompt again.
7. Type the make install command.

At this time, the compiler will create the final DSO and place it in the Apache module directory. It will also modify Apache's httpd.conf configuration file for you. After that, the system will return to the command prompt and wait for your input. New directive. Then, you can open Apache’s httpd.conf configuration file and make some corrections:

1. Find the line with the word ServerAdmin and add your own email address, as shown below:

ServerAdmin you@yourdomain.com

2. Find the line starting with ServerName and change the following parameters to actual values, such as:

ServerName localhost

3. Find the following paragraph:

# And for PHP 4.x, use:
#
#AddType application/x-httpd-php .php
#AddType application/x-httpd-php-source .phps

Modify these configuration lines to cancel some comments added before AddType under PHP 4.0. At the same time, you should add some file extensions used by PHP. The modified lines above may look like the following:

# And for PHP 4.x, use:
#
AddType application/x-httpd-php .php .phtml
AddType application/x-httpd-php-source .phps

Save the above configuration file, return to the upper-level directory, and type the following command to start Apache:

./bin/apachectl start

If no problems occur during startup, you can test the installation of Apache and PHP by creating a file called phpinfo.php that contains the following lines of code:

Save the file and place it in the Apache document root directory (htdocs), then start your web browser and type http://localhost/phpinfo.php in the browser address bar, and the browser will Various variables and variable values ​​of PHP and Apache systems are displayed in a large space.

If you want to reset PHP, all you need to do is execute the make clean command, then execute the ./configure command with the new configuration options, and then execute make and make install. In this way, a new module will appear in the Apache modules directory, and you only need to restart Apache to load the new module. Many of the previous headaches are now gone.