PHP开发者基本都是万能var_dump,很少echo对象,echo对象默认会报错.
echo对象时默认会自动调用魔术方法__toString
蹭点百度流量
// 1.Object of class a could not be converted to string (报错) /* class a{ } $a = new a(); echo $a; */ // 2.正常 class a { function __toString() { return 'learn c++'; } } $a = new a(); echo $a;