Ejemplos de C::returnVariableByRef en PHP

Ejemplo n.º 1

Archivo: returnByReference.004.php Proyecto: badlamer/hhvm

    static function returnConstantByValue()
    {
        return 100;
    }
    static function &returnConstantByRef()
    {
        return 100;
    }
    static function &returnVariableByRef()
    {
        return $GLOBALS['a'];
    }
}
echo "\n---> 1. Trying to assign by reference the return value of a function that returns by value:\n";
unset($a, $b);
$a = 4;
$b =& C::returnConstantByValue();
$a++;
var_dump($a, $b);
echo "\n---> 2. Trying to assign by reference the return value of a function that returns a constant by ref:\n";
unset($a, $b);
$a = 4;
$b =& C::returnConstantByRef();
$a++;
var_dump($a, $b);
echo "\n---> 3. Trying to assign by reference the return value of a function that returns by ref:\n";
unset($a, $b);
$a = 4;
$b =& C::returnVariableByRef();
$a++;
var_dump($a, $b);

Ejemplo n.º 2

Archivo: tests_lang_returnByReference.005.php Proyecto: gleamingthecube/php

    {
        return 100;
    }
    function &returnConstantByRef()
    {
        return 100;
    }
    static function &returnVariableByRef()
    {
        return $GLOBALS['a'];
    }
}
$c = new C();
echo "\n---> 1. Trying to assign by reference the return value of a function that returns by value:\n";
unset($a, $b);
$a = 4;
$b =& $c->returnConstantByValue();
$a++;
var_dump($a, $b);
echo "\n---> 2. Trying to assign by reference the return value of a function that returns a constant by ref:\n";
unset($a, $b);
$a = 4;
$b =& $c->returnConstantByRef();
$a++;
var_dump($a, $b);
echo "\n---> 3. Trying to assign by reference the return value of a function that returns by ref:\n";
unset($a, $b);
$a = 4;
$b =& $c->returnVariableByRef();
$a++;
var_dump($a, $b);