PHP

Server-side scripts.

PHP (also here)
- Sample PHP code
php.net manual
- Language Reference
- List of functions
Sample PHP scripts

Environment and calling programs

to display structure of variable:

	var_dump($variable);
	print_r($variable);

Predefined Variables
- $_SERVER
- to see incoming environment variables:
  - var_dump($_SERVER);
To see local configuration of PHP, set up a test.php page that does:
- phpinfo();
accessing command-line:

Example

My demo PHP server-side page illustrates some environment variables etc.

Just put in your normal webspace. Only needs read permission, not executable.
PHP mini test

Call with arguments

PHP can be used with arguments in the URL.
This is like a CGI script with HTTP GET, like a Google search.

http://host/prog.php?variable=value

Example:

mind.php?mind=test093

Parsed like this in mind.php:

<html> <?PHP $qs=$_SERVER["QUERY_STRING"]; parse_str ( $qs ); // $mind is now defined as whatever the value was ?> <head> <?PHP print "<title> Mind: $mind </title> \n"; ....

Stand-alone PHP scripts

Can use PHP as just general offline scripting language.
Can run Stand-alone PHP scripts at command-line. Something like:

#!/usr/local/bin/php 

Whatever is outside PHP is just displayed.

<?php

// echo PHP_VERSION;

 print "Name of script = $argv[0] \n"; 
 print "First command-line arg = $argv[1] \n"; 

 print "All command-line args: \n";
 print_r($argv); 
 print "\n"; 

?>

Whatever is outside PHP is just displayed.

On DCU Linux try:

#!/local1/php5/bin/php