在PHP5中，变量可以作为函数1进行评估，例如：
function myFunc() {
echo "whatever";
}
$callableFunction = 'myFunc';
$callableFunction(); // executes myFunc()
是否有任何语法可以将对象成员函数分配给变量，例如：
class MyClass {
function someCall() {
echo "yay";
}
}
$class = new MyClass();
// what I would like:
$assignedFunction = $class->someCall; // but I tried and it returns an error
$memberFunc = 'someCall';
$class->$memberFunc(); // I know this is valid, but I want a single variable to be able to be used to call different functions - I don't want to have to know whether it is part of a class or not.
// my current implementation because I don't know how to do it with anonymous functions:
$assignedFunction = function() { return $class->someCall(); } // <- seems lengthy; would be more efficient if I can just assign $class->someCall to the variable somehow?
$assignedFunction(); // I would like this to execute $class->someCall()
有一种方法，但对于php5.4及以上版本。。。
class MyClass {
function someCall() {
echo "yay";
}
}
$obj = new Myclass();
$ref = array($obj, 'someCall');
$ref();
嗯。。实际上它也适用于静态，只需使用名称引用即可。。
class MyClass {
static function someCall2() {
echo "yay2";
}
}
$ref = array('MyClass', 'someCall2');
$ref();
对于非静态，这种表示法也适用。它创建该类的一个临时实例。因此，这就是您所需要的，只需要php5.4及以上版本）
上面的PHP 5.4解决方案很好。如果你需要PHP 5.3，我认为你不能比匿名函数方法做得更好，但你可以把它包装成一个与PHP 5.4方法非常相似的函数：
function buildCallable($obj, $function)
{
return function () use ($obj, $function) {
$args = func_get_args();
return call_user_func_array(array($obj, $function), $args);
};
}
//example
class MyClass
{
public function add($x, $y)
{
return $x + $y;
}
public static function multiply($x, $y)
{
return $x * $y;
}
}
//non-static methods
$callable = buildCallable(new MyClass(), 'add');
echo $callable(32, 10);
//static methods
$callable = buildCallable('MyClass', 'multiply');
echo $callable(21, 2);
这应该适用于任何（公开可见的）方法的任何数量的参数。