PHP Functions Calling Variable Functions Problem You want to call different functions depending on a variable’s value. Solution Use call_user_func():             function get_file($filename) { return file_get_contents($filename); }    ...

PHP Functions  Returning Values by Reference Problem You want to return a value by reference, not by value. This allows you to avoid making a duplicate copy of a variable. Solution The syntax for returning a variable by reference is simila...

PHP Functions Using Named Parameters Problem You want to specify your arguments to a function by name, instead of simply their position in the function invocation. Solution PHP doesn’t have language-level named parameter support like som...

PHP Functions Accessing Function Parameters Problem You want to access the values passed to a function. Solution Use the names from the function prototype:           function commercial_sponsorship($letter, $number) {               ...

PHP Functions Introduction Functions help you create organized and reusable code. They allow you to abstract out details so your code becomes more flexible and more readable. Without functions, it is impossible to write easily maintainable...