Q:

How do you create PHP functions?

A:

Quick Answer

PHP functions are defined by using the word "function" followed by a name. Afterward, functional arguments are defined within parentheses, and the function's code is placed within curly braces. The function is utilized by calling the function using its name and assigning data to the arguments.

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Full Answer

  1. Determine the scope of your function

    Consider the data your function needs to work with and the actions it needs to perform. Think of a name that explains these actions. The best functions are versatile and reused numerous times.

  2. Define the function

    Use the following template to define your function: function myFunction($argument1, $argument2, $optionalArgument = null) { Your function code goes here } Replace myFunction with the desired function name. Begin each argument with a dollar sign followed by the argument name. Use as many arguments as desired. If your function does not need arguments, leave the area between the parentheses empty. Define any optional arguments by declaring default values.

  3. Use the function

    Call your function as needed throughout your script. Use variables directly from your script or pass data directly to the function. Use the following template to define and execute a function: // Define the function function divideByTwo($numberToDivide) { $result = $numberToDivide / 2; return $result; } // Use the function $number = 20; $half = divideByTwo($number); echo $half; // Displays 10 echo divideByTwo(30); // Displays 15

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