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@ 2013-09-24T17:31:56Z

<?php
//this seems to work as if there is 2 variables both a protected static and a protected non-static
class foo {
    protected static $myvar = 999;

    //Uncommenting below leads to a Cannot redeclare foo::$myvar
    //public $myvar = 77;


    //Normal non-static Instance Functions
    public function __construct(){}

    public function instancePrintVar(){
        echo __FUNCTION__.' '.$this->myvar;
    }
    public function instanceSetVar($v){
        $this->myvar = $v; 
    }

    //Static functions

    public static function staticPrintVar(){
        echo __FUNCTION__.' '.self::$myvar;
    }

    public static function staticSetVar($v){
        self::$myvar = $v;
    }
}

function nl(){ echo "\n"; }

foo::staticPrintVar();
nl();

$foo = new foo();
$foo->instanceSetVar(3);
$foo->instancePrintVar();
nl();

foo::staticPrintVar(); nl();
$foo::staticPrintVar(); nl();

foo::staticSetVar(888);
foo::staticPrintVar();
$foo->instancePrintVar();



echo "Conclusion: when using \$this-> to change the value, it adds another non-static version rather than changing the static version";

Output for git.master, git.master_jit, rfc.property-hooks: staticPrintVar 999 Notice: Accessing static property foo::$myvar as non static in /in/4KuhD on line 17 Deprecated: Creation of dynamic property foo::$myvar is deprecated in /in/4KuhD on line 17 Notice: Accessing static property foo::$myvar as non static in /in/4KuhD on line 14 instancePrintVar 3 staticPrintVar 999 staticPrintVar 999 staticPrintVar 888 Notice: Accessing static property foo::$myvar as non static in /in/4KuhD on line 14 instancePrintVar 3Conclusion: when using $this-> to change the value, it adds another non-static version rather than changing the static version

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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