试图理解php中的getModifiers（）

Question

<?php
class Testing
{
    final public static function foo()
    {
        return;
    }
    public function bar()
    {
        return;
    }
}

$foo = new ReflectionMethod('Testing', 'foo');

echo "Modifiers for method foo():
";
echo $foo->getModifiers() . "
";
echo implode(' ', Reflection::getModifierNames($foo->getModifiers())) . "
";

$bar = new ReflectionMethod('Testing', 'bar');

echo "Modifiers for method bar():
";
echo $bar->getModifiers() . "
";
echo implode(' ', Reflection::getModifierNames($bar->getModifiers()));
?>

Above code is taken from Example #1 ReflectionMethod::getModifiers() example in php manual: http://php.net/manual/en/reflectionmethod.getmodifiers.php

Question: the code :$foo->getModifiers(), output is 261, what does this mean?

Answer 1

It is a bitfield, consisting of the bitwise OR of these constants.

Reflection::getModifierNames makes it a bit more understandable:

php> =Reflection::getModifierNames(261)
array(
  0 => "final",
  1 => "public",
  2 => "static",
)