Online PHP editor | rfc for 0VUCO

@ 2025-06-05T10:17:44Z

<?php

//normal function declaration
    function greeting(){
        return "Hellow Developers!";
    }

    echo greeting();
    echo "\n";

    //function argument and parameter
    function addition($a,$b){
        return $a+$b;
    }

    echo addition(10,20);
    echo "\n";

    //default function argument
    function defaultParam($a,$b=30){
        return $a+$b;
    }

    echo defaultParam(10);
     echo "\n";
    echo defaultParam(10,25);
    echo "\n";


    //variable scope within function
    $global = "I am a global variable";
    function variableScope(){
        echo $local = "I am a local variable";
        echo "\n";
        global $global ;
        echo $global;
         echo "\n";
        echo $GLOBALS['global'];
         echo "\n";
    }

    variableScope();

    //anonymous function

    $anonymousFunction = function($a){
        return $a*$a;
    };

    echo $anonymousFunction(10);
     echo "\n";

    //arrow function

    $arraowFunc = fn($a,$b)=>($a+$b);

    echo $arraowFunc(20,30);
     echo "\n";

//callback function 


function myFunc($callback){
    return $callback("World");
}

$result = myFunc(function($xyz){
    return "Hellow, $xyz";
});

echo $result;
    

?>

Output for git.master_jit, git.master: Hellow Developers! 30 40 35 I am a local variable I am a global variable I am a global variable 100 50 Hellow, World

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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