PHP Syntax
Here's a brief overview of the syntax of PHP:PHP code is typically embedded in HTML, and is enclosed in <?php and ?> tags.
<html>
<head>
<title>PHP Syntax Example</title>
</head>
<body>
<?php
// PHP code goes here
$name = "John";
echo "Hello, $name!";
?>
</body>
</html>
PHP variables start with a dollar sign $, followed by the variable name. Variables in PHP are loosely typed, which means that they do not have a specific data type until they are assigned a value.
<?php
$name = "John";
$age = 25;
$is_student = true;
?>
<?php
$name = "John";
$age = 25;
$is_student = true;
?>
PHP statements end with a semicolon ;.
<?php
$x = 10;
$y = 20;
$z = $x + $y; // statement ends with semicolon
?>
<?php
$x = 10;
$y = 20;
$z = $x + $y; // statement ends with semicolon
?>
PHP comments can be used to add explanatory text to your code. There are two types of comments in PHP:Single-line comments start with // and continue to the end of the line.
<?php
// This is a single-line comment
$name = "John"; // This is also a comment
?>
Multi-line comments start with /* and end with */, and can span multiple lines.
<?php
/*
This is a
multi-line comment
*/
?>
<?php
// This is a single-line comment
$name = "John"; // This is also a comment
?>
Multi-line comments start with /* and end with */, and can span multiple lines.
<?php
/*
This is a
multi-line comment
*/
?>
PHP functions are blocks of code that perform a specific task. Functions can take arguments and return values, and are defined using the function keyword.
<?php
// Define a function that takes two arguments and returns their sum
function add($a, $b) {
return $a + $b;
}
// Call the function and store the result in a variable
$sum = add(10, 20);
echo "The sum is $sum";
?>
These are just a few examples of the syntax of PHP. PHP is a powerful language with a wide range of features, so there's much more to explore beyond this brief introduction.
<?php
// Define a function that takes two arguments and returns their sum
function add($a, $b) {
return $a + $b;
}
// Call the function and store the result in a variable
$sum = add(10, 20);
echo "The sum is $sum";
?>
These are just a few examples of the syntax of PHP. PHP is a powerful language with a wide range of features, so there's much more to explore beyond this brief introduction.
Tags:
PHP