Php Functions Examples Php code to call an existing php functionA Simple Anonymous Function Dynamically Creating Functions Create function from string Declaring a Simple Function Function printing text on a Web Page Declaring a Function A Simple User Function A Function Requiring Two Arguments A Function to Build Query Strings A function that calculates sales tax Accessing a Global Variable from Within a Function Build and then call a function Call the function Create a User Function Defining functions before or after calling them Creating and calling a function that accepts arguments Define constant in a function nesting functions global key word in a function Variables Defined Outside Functions Are Inaccessible from Within a Function by Default Using nested functions Calling Functions Dynamically Calling a Function Dynamically Calling Variable Functions Creating Dynamic Functions return the function name from a function call or calculation Variable function example Variable Function Names Using a variable function determined by some input variable String Manipulation Using Arrays of Lambda Functions Define recursive function to delete directories Function Recursion Demo A recursive function is a function that calls itself from within its own code. Using a recursive function to sum an integer set Recursive Function Example Recursive Functions bool function_exists ( string function_name ) returns true if that function is available for use. Testing for a Function's Existence func_num_args() and func_get_args() Accessing function parameters without using the argument list Get parameter count from func_num_args () Variable Parameter Counts bool is_callable ( mixed var [, bool check_syntax_only [, string &proper_name]] ) returns true if a function can be called Nested function Overriding the Function of a Base Class Calling an Overridden Function Functions and References A function that takes a reference for an argument Declaring a Function with Arguments Function with default parameters Passing Variables as a Reference to the Argument of a Function Passing an Argument to a Function by Value Using a Function Call to Pass an Argument to a Function by Reference Declaring a Function That Requires Arguments Function with an Optional Argument A Function with an Optional Argument Accessing Function Parameters All optional arguments Capturing a return value Changing argument values Defining and Calling a two-argument function, Function Arguments Function with two parameters Creating Functions That Take a Variable Number of Arguments Creating a capitalize function with a default parameter $each Default Parameters Define whether a variable is passed by value or reference Passing By Reference Making arguments be passed by reference Using Optional Parameters Function return more than one value Math Function Library A Function That Returns a Value Function Requiring Two Arguments Functions that return true or false Returning a value from a function Returning an array from a function Returning a list an array from function Returning Values by Reference Returning a Value by Reference Returning by Reference Returning More Than One Value Multiple return statements in a function return multiple values from a function Using an array returned from a function Passing Arguments and Returning Values by Reference User-Defined Function to Determine a Leap Year

Php Code : Declaring A Simple Function

Declaring a Simple Function in php

  function aFunction(){
      print "Music is a way of life!";