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PHP code is executed on the server, and the plain HTML result is
sent to the browser.
Basic PHP Syntax
A PHP scripting block always starts with <?php and ends with
?>. A PHP scripting block can be placed anywhere in the document.
On servers with shorthand support enabled you can start a scripting block
with <? and end with ?>.
For maximum compatibility, we recommend that you use the standard form
(<?php) rather than the shorthand form.
<?php ?> |
A PHP file normally contains HTML tags, just like an HTML file, and some PHP
scripting code.
Below, we have an example of a simple PHP script which sends the text "Hello
World" to the browser:
<html> <?php </body> |
Each code line in PHP must end with a semicolon. The semicolon is a separator
and is used to distinguish one set of instructions from another.
There are two basic statements to output text with PHP: echo and
print. In the example above we have used the echo statement to output the
text "Hello World".
Note: The file must have the .php extension. If the file has a .html
extension, the PHP code will not be executed.
Comments in PHP
In PHP, we use // to make a single-line comment or /* and */ to make a large
comment block.
<html> <?php //This is a comment /* ?> </body> |
