Examples of Variable Functions in php

Examples of Variable Functions in php

Examples of php Variable Functions

The variable functions of php are summarized in the php manual and are of little use today;

PHP supports the concept of variable functions. This means that if a variable name has parentheses, PHP will look for a function with the same name as the value of the variable and try to execute it. Variable functions can be used for some purposes, including callback functions and function tables.

Variable functions cannot be used for echo, print, unset (), isset (), empty (), include, require, and similar language structures. You need to use your own packaging functions to use these structures as variable functions.

Class Foo {function Variable () {$ name = 'bar'; $ this-> $ name (); // This callthe Bar () method} function Bar () {echo "This is Bar" ;}}$ foo = new Foo (); $ funcname = "Variable"; $ foo-> $ funcname (); // This CILS $ foo-> Variable () class Foo {static $ variable = 'static properties'; static function Variable () {echo 'method Variable called ';}} echo Foo: $ variable; // This prints 'static properties '. it does need a $ variable in this scope. $ variable = "Variable"; Foo: $ variable (); // This CILS $ foo-> Variable () reading $ variable in this scope.

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