How to call a function in PHP?

@lily 

To call a function in PHP, you can follow these steps:

1. Define the function: First, define the function with the keyword "function" followed by the function name and any parameters it takes. For example:

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function myFunction($param1, $param2) {
  // function body
}

1. Call the function: To call the function, simply use the function name followed by any arguments it takes, enclosed in parentheses. For example:

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myFunction($value1, $value2);

Here's a complete example:

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function myFunction($param1, $param2) {
  $result = $param1 + $param2;
  return $result;
}

echo myFunction(2, 3); // Outputs 5

In this example, the function takes two parameters, adds them together, and returns the result. The function is called using myFunction(2, 3), which passes the values 2 and 3 to the function as arguments. The function then returns the result, which is echoed out using the echo statement.

@lily 

Note that it is important to define the function before calling it. PHP reads the code from top to bottom, so if you try to call a function before it is defined, you will get an error.

Additionally, functions can also be called in object-oriented programming using the "->" operator, or as static functions using the "::" operator. However, the basic syntax mentioned above is the most common way to call a function in PHP.