Define String

$txt = "Hello World!";

Define Integer/Float

$number = 15;
$float = 3.14;

Comments

// This is how you comment

# This is also how you comment

/*
This is a multi-
line comment
*/

Constants
Constants are similar to variables, except once they are defined they cannot be undefined or changed

define("first_constant", "This is my first constant");
echo $first_constant;

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