身份证校验—–后端

用的是think2017年父亲节php5 + layui

代码：

public 作文赏析function add(){if($this->request->isajax()){$request = new request();     $params = $this->request->param();   $title = $params['title']; $identity = $params['identity'];if(empty($identity)){$this->error('请输入您的身份证号或护照号！');} if( strlen($identity ) != 18 ) {$this->error('您输入的身份证号码有误！');}$crad_id_ba = substr($identity , 0, 17);$crad_id_verify = substr($identity , -1);// 加权因子 $factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3);// 校验码对应值 $verify_number_list = array('1', '0', 'x', '9', '8', '7', '6', '5', '4', '3', '2');$checksum = 0;for( $i = 0; $i < strlen($crad_id_ba); $i++ ) {$checksum += substr($crad_id_ba, $i, 1) * $factor[$i % 10];}$mod = $checksum % 11;if( $crad_id_verify == $verify_number_list[$mod] ) {$result = db::name('volunteers')->where(['identi英国大学世界排名ty'=>$identity])->find();if($result){$this->error('该志愿者身份证号已存在，请勿重复添加！');}el{$data = ['title'          => ist($params['title']) ? $params['title'] :黄河大合唱赏析 '','volun_no'       => ist($params['volun_no']) ? $params['volun_no'] : '','urid'         => ist($params['urid']) ? $params['urid'] : 0,'createtime'     =&g儿童成语故事大全t; time(),'updatetime'     => time(),'identity'       => $params['identity'],'identity_type'  => ist($params['identity_type']) ? $params['identity_type'] : 1,]; if($result = db::name('volunteers')->inrt($data)){return $this->success('志愿者添加成功！');}el{return $this->error('志愿者添加失败！');} return;} return;}                                                       }      return $this->fetch();}