PHP
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| − | PHP is | + | PHP is a recursive acronym for ''PHP Hypertext Preprocessor''. It is an interpreted script language commonly used for dynamic pages generation on webservers. It is generally installed side by side with the [[Apache]] web server, and [[MySQL]] or [[PostgreSQL]] as database management system. |
==Installing PHP== | ==Installing PHP== | ||
| − | PHP is available | + | PHP is available from the port-tree ... |
# cd /usr/ports/lang/php5 | # cd /usr/ports/lang/php5 | ||
... and the packages ... | ... and the packages ... | ||
| Line 11: | Line 11: | ||
There are two ways to use PHP : | There are two ways to use PHP : | ||
* With apache: configure apache to use php to process .php files requested by the user. | * With apache: configure apache to use php to process .php files requested by the user. | ||
| − | * As command interpreter: php can process scripts, or instructions typed at the commandline. | + | * As a command interpreter: php can process scripts, or instructions typed at the commandline. |
===PHP for dynamic websites=== | ===PHP for dynamic websites=== | ||
| Line 23: | Line 23: | ||
You have to restart Apache to have your changes effective. For example, if you use Apache 2: | You have to restart Apache to have your changes effective. For example, if you use Apache 2: | ||
| − | /usr/local/etc/rc.d/apache2 restart | + | /usr/local/etc/rc.d/apache2.sh restart |
| − | Now, you can try your installation by creating a file test.php: | + | Now, you can try your installation by creating a file test.php in the /usr/local/www/data directory: |
<? | <? | ||
phpinfo(); | phpinfo(); | ||
?> | ?> | ||
| − | Request test.php using your web browser, and if all is well it will show you your | + | Request test.php using your web browser, and if all is well it will show you your PHP configuration. |
===Scripts in PHP=== | ===Scripts in PHP=== | ||
| Line 49: | Line 49: | ||
'''%''' chmod +x phpscript | '''%''' chmod +x phpscript | ||
| − | Then, you can run it from the | + | Then, you can run it from the command line. |
'''%''' ./phpscript | lynx -stdin | '''%''' ./phpscript | lynx -stdin | ||
In this case, we've piped to <code>lynx</code>, so that we can browse the nicely formatted result. | In this case, we've piped to <code>lynx</code>, so that we can browse the nicely formatted result. | ||
| − | <pre> | + | <pre style="background-color:black; color:white"> |
Defined Constants (p1 of 154) | Defined Constants (p1 of 154) | ||
| Line 67: | Line 67: | ||
</pre> | </pre> | ||
| − | Or, we could have executed the command directly from the | + | Or, we could have executed the command directly from the command line: |
'''%''' php -r 'echo "Hello from PHP ". phpversion() . "\n"; print_r(get_defined_constants());' | '''%''' php -r 'echo "Hello from PHP ". phpversion() . "\n"; print_r(get_defined_constants());' | ||
Hello from PHP 5.1.4 | Hello from PHP 5.1.4 | ||
Latest revision as of 21:52, 22 October 2009
PHP is a recursive acronym for PHP Hypertext Preprocessor. It is an interpreted script language commonly used for dynamic pages generation on webservers. It is generally installed side by side with the Apache web server, and MySQL or PostgreSQL as database management system.
Contents |
[edit] Installing PHP
PHP is available from the port-tree ...
# cd /usr/ports/lang/php5
... and the packages ...
# pkg_add -r php5
[edit] Using PHP
There are two ways to use PHP :
- With apache: configure apache to use php to process .php files requested by the user.
- As a command interpreter: php can process scripts, or instructions typed at the commandline.
[edit] PHP for dynamic websites
All the steps of Apache configuration are explained after PHP installation. You have to add these two lines in httpd.conf:
AddType application/x-httpd-php .php AddType application/x-httpd-php-source .phps
You will probably also want to add index.php as a possible directory index:
DirectoryIndex index.html index.php
You have to restart Apache to have your changes effective. For example, if you use Apache 2:
/usr/local/etc/rc.d/apache2.sh restart
Now, you can try your installation by creating a file test.php in the /usr/local/www/data directory:
<? phpinfo(); ?>
Request test.php using your web browser, and if all is well it will show you your PHP configuration.
[edit] Scripts in PHP
If you have compiled PHP with the commandline interface, you can write scripts in PHP that can be used from the shell. This is very useful for quick and dirty hacks; especially if you want your output to be HTML. Put the PHP code in a file like this :
#!/usr/local/bin/php # phpscript <html> <title>Defined Constants</title> <body> <h1><? echo "Hello from PHP " .phpversion() ?></h1> <pre><? print_r(get_defined_constants()) ?></pre> </body></html>
Make the file executable:
% chmod +x phpscript
Then, you can run it from the command line.
% ./phpscript | lynx -stdin
In this case, we've piped to lynx, so that we can browse the nicely formatted result.
Defined Constants (p1 of 154)
Hello from PHP 5.1.4
Array
(
[E_ERROR] => 1
[E_WARNING] => 2
[E_PARSE] => 4
[E_NOTICE] => 8
-- press space for more, use arrow keys to move, '?' for help, 'q' to quit.
Or, we could have executed the command directly from the command line:
% php -r 'echo "Hello from PHP ". phpversion() . "\n"; print_r(get_defined_constants());' Hello from PHP 5.1.4 Array ( ...
