In PHP, a method or function can be declared using the function keyword followed by the function name and its parameters, if any. Here are some examples:
1. Simple function with no parameters:
function greet() {
echo "Hello!";
}
This function simply echoes a greeting message when called.
2. Function with parameters:
function add($num1, $num2) {
return $num1 + $num2;
}
This function takes two parameters,
num1 and num2, adds them together, and returns the result.
3. Method in a class:
class Person {
public $name;
public function sayHello() {
echo "Hello, my name is " . $this->name;
}
}
This is a method declaration in a class. It sets the
name property of the class and defines the behavior of the sayHello() method, which echoes a personalized greeting.
In all cases, the function or method declaration must be followed by a set of parentheses, even if there are no parameters. These can then be called throughout your code and will execute their defined behavior when triggered.