php输出字符串方法总结

$v = new test();
print_r($v);
var_dump($v);
class test {
    public $num = 1;
    public $str = "222";
    public $bln = true;
    function test() {
        global $num;
    }
}

结果为： test object ( [num] => 1 [str] => 222 [bool] => 1 ) object(test)#1 (3) { ["num"]=> int(1) ["str"]=> string(3) "222" ["bool"]=> bool(true) }