PHP (Hypertext Preprocessor) is a scripting language that is primarily used for web development. Here are some of the basic syntax rules for writing PHP code:
PHP code is typically embedded in HTML pages and is enclosed in special PHP tags:
?>. Code outside of these tags is treated as regular HTML.
PHP statements end with a semicolon (;).
Variables are declared using the dollar sign ($) followed by the variable name. For example,
$name = "Arv";.
Strings can be enclosed in single quotes (‘ ‘) or double quotes (” “). For example,
$greeting = 'Hello';or
$message = "It's a beautiful day!";.
Comments can be added to PHP code using either two forward slashes (//) or a forward slash and an asterisk (/* */).
Control structures, such as if statements and loops, are used to control the flow of execution in a PHP program.
PHP has a number of built-in functions, such as
date, and many others, that can be used to perform various tasks.
Here is an example of a simple PHP program that demonstrates some of these syntax rules:
<!DOCTYPE html> <html> <head> <title>PHP Syntax Example</title> </head> <body> <?php $name = "John"; $age = 25; $greeting = "Hello, " . $name . "! You are " . $age . " years old."; echo $greeting; ?> </body> </html>
In this example, we declare two variables,
$age, and use them to create a string,
$greeting, using the concatenation operator (the period or dot). We then use the
echo function to output the string to the web page.