PHP is a server side scripting language which is executed on the server, and the plain HTML result is sent back to the browser.
Let's understand the basic syntax of php code example
A PHP script can be placed anywhere in the document and it starts with <?php and ends with ?>
<?php
// You can write PHP Code here
?>
Default file extension of PHP files is ".php".
;).Example
<!DOCTYPE html>
<html>
<body>
<h1>My first PHP page</h1>
<?php
echo "Hello World!";
?>
</body>
</html>In PHP Language all keywords (e.g. if, else, while, echo, etc.), classes, functions, and user-defined functions are not case-sensitive.
the below example show all three echo statements below are equal and legal:
Example :
<!DOCTYPE html>
<html>
<body>
<?php
ECHO "Hello World!<br>";
echo "Hello World!<br>";
EcHo "Hello World!<br>";
?>
</body>
</html>Check the below example; only the first statement will display the value of the $color variable! This is because $color, $COLOR, and $coLOR are treated as three different variables:
<!DOCTYPE html>
<html>
<body>
<?php
$color = "blue";
echo "My car is " . $color . "<br>";
echo "My house is " . $COLOR . "<br>";
echo "My dress is " . $coLOR . "<br>";
?>
</body>
</html>