PHP is a server side general purpose scripting language, most widely used for developing web applications. It supports various databases namely MySQL, FbSQL, GeoIP, YAZ databases and so on.
Rasmus Lerdorf, a Greenlandic-Danish programmer created PHP in the year 1994. It is easy to learn. No prior programming language experience is required.
PHP file terminates with an extension .php .
Lets begin learning with an example,
<!DOCTYPE HTML> <html> <body> <?php echo "Hello world, PHP script goes here!!"; ?> </body> </html>
Place the above piece of code in a file with an extension .php. When it gets executed, the text inside double quotes gets displayed on the terminal. In this example, PHP code begins with
PHP supports both single line and multi line comments that can be embedded in a .php webpage. Single line comments begin with double forward slash or single hash and multi-line comments can be embedded within special characters as shown below. Usage of comments is similar to C, C++, PERL and so on which makes easy to remember.
<?PHPand ends with
<?php echo 'This is a test'; // This is a single-line c++ style comment echo 'One Final Test'; # This is a one-line unix shell-style comment /* This is a multi line comment yet another line of comment */ ?>