Programming Smart Functions Using Php & Php 7


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The real power of PHP comes from its functions; it has more than 1000 built-in functions.PHP User Defined FunctionsBesides the built-in PHP functions, we can create our own functions.A function is a block of statements that can be used repeatedly in a program.A function will not execute immediately when a page loads.A function will be executed by a call to the function.Create a User Defined Function in PHPA user-defined function declaration starts with the word function:Syntaxfunction functionName() { code to be executed;}Note: A function name can start with a letter or underscore (not a number).Tip: Give the function a name that reflects what the function does!Function names are NOT case-sensitive.In the example below, we create a function named “writeMsg()”. The opening curly brace ( { ) indicates the beginning of the function code and the closing curly brace ( } ) indicates the end of the function. The function outputs “Hello world!”. To call the function, just write its name:Example<?phpfunction writeMsg() { echo “Hello world!”;}writeMsg(); // call the function?>