function getAdder($x)
{
return function ($y) use ($x) {
return $x + $y;
};
}
$adder = getAdder(8);
echo $adder(2); // prints "10"
在这里, getAdder ( )函数创建一个封闭使用参数$ × (关键字“使用”势力越来越变量上下文) ,它需要额外的参数$ Y和返回到调用。这种功能可以储存,因为作为参数到另一个功能等详细内容见兰布达职能和关闭的RFC 。
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