<?php class Teacher { public function teach() { echo "Teaching"; return $this; } public function training() { echo "Training"; return $this; } } $teach = new Teacher(); $teach->teach()->training();
} } class Teacher extends Human { public $level; public function teach($subject) { echo $this->name, '的老师在讲授', $subject, '<br/><br/>'; } } class Soldier extends Human { public $junxian; function zhangang() { echo '这名战士名字为', $this->name, '在军XIAN为', $this->junxian, ',他/她站岗<br/><br/>'; } } $s1 = new Soldier(); $s1->name = '李四'; $s1->junxian = '中校'; $s1->zhangang(); // ////// $s2 = new Soldier(); $s2->name = '赵六'; $s2->eat('面包'); // //// $t = new Teacher(); $t->name = '张飞'; $t->teach('化学'); $t->say('同学们好,今天咱们开始学习化学这门课');