Yii框架之分页、分页核心分析、表单注册完成逻辑、用户注册表单验证代码追踪

灰太狼 2022-05-23 02:36 116阅读 0赞

**数据分页、前台用户注册、根据具体情况讲解用户登陆系统**

** **

**【商品信息分页数据】**

**总的记录数目count  == 110条数据**

**每页需要显示信息数目per  ==  20条数据**

**分页的总页数  page = count 除以 per  向上取整  5.5向上取整等于6**

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**获得具体每页信息**

**limit  该关键字在mysql里边可以限制每次获得信息的条数**

**limit  偏移量，条数;**

**偏移量=(n-1)\*per,20;**

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**第一页：limit  0,20;    1**

**第二页：limit  20,20;   2**

**第三页：limit  40,20;   3**

**第n页：limit  (n-1)\*per,20;**

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**我们已经准备好了一个分页类**

**通过小案例，演示分页类使用。**

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**分页类与Yii框架结合**

**分页类在Yii框架里边以组件components形式存在**

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**分页：**

1. **获得总的商品记录数目**

2. **实例化分页对象**

3. **重新拼装具体分页sql语句指令**

4. **获得页码列表**

** **

**分页类与Yii框架结合，是以组件components的形式存在。**

**【前台实现用户注册功能】**

**就是在数据库里边建立一张数据表，建立一个表单，实现信息收集存入数据库**

**在本质上与商品添加是一样的**

① **实现多种样式表单域**

② **表单数据验证**

**在数据库建立用户注册表sw\_user**

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**设置separator分割符。**

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**实现用户注册信息收集、校验信息(表单验证)**

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**现在我们实现表单验证。**

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**我们调用attributes一个模型里边不存在的属性，类会自动执行魔术方法\_\_set();**

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**内容总结：**

1. **数据分页实现  分类页当做组件被继承到Yii框架里边**

2. **小物件widget创建用户注册表单，使用多种表单域实现方法。**

3. **通过model数据模型里边的方法rules()设置，具体验证规则**

4. **attributes是数据模型的属性，可以帮组我们收集表单信息。**

page.class.php

<?php
    	class Page {
    		private $total; //数据表中总记录数
    		private $listRows; //每页显示行数
    		private $limit;
    		private $uri;
    		private $pageNum; //页数
    		private $config=array('header'=>"个记录", "prev"=>"上一页", "next"=>"下一页", "first"=>"首 页", "last"=>"尾 页");
    		private $listNum=8;
    		/*
    		 * $total 
    		 * $listRows
    		 */
    		public function __construct($total, $listRows=10, $pa=""){
    			$this->total=$total;
    			$this->listRows=$listRows;
    			$this->uri=$this->getUri($pa);
    			$this->page=!empty($_GET["page"]) ? $_GET["page"] : 1;
    			$this->pageNum=ceil($this->total/$this->listRows);
    			$this->limit=$this->setLimit();
    		}
    
    		private function setLimit(){
    			return "Limit ".($this->page-1)*$this->listRows.", {$this->listRows}";
    		}
    
    		private function getUri($pa){
    			$url=$_SERVER["REQUEST_URI"].(strpos($_SERVER["REQUEST_URI"], '?')?'':"?").$pa;
    			$parse=parse_url($url);
    
    		
    
    			if(isset($parse["query"])){
    				parse_str($parse['query'],$params);
    				unset($params["page"]);
    				$url=$parse['path'].'?'.http_build_query($params);
    				
    			}
    
    			return $url;
    		}
    
    		function __get($args){
    			if($args=="limit")
    				return $this->limit;
    			else
    				return null;
    		}
    
    		private function start(){
    			if($this->total==0)
    				return 0;
    			else
    				return ($this->page-1)*$this->listRows+1;
    		}
    
    		private function end(){
    			return min($this->page*$this->listRows,$this->total);
    		}
    
    		private function first(){
    			if($this->page==1)
    				$html.='';
    			else
    				$html.="  <a href='{$this->uri}&page=1'>{$this->config["first"]}</a>  ";
    
    			return $html;
    		}
    
    		private function prev(){
    			if($this->page==1)
    				$html.='';
    			else
    				$html.="  <a href='{$this->uri}&page=".($this->page-1)."'>{$this->config["prev"]}</a>  ";
    
    			return $html;
    		}
    
    		private function pageList(){
    			$linkPage="";
    			
    			$inum=floor($this->listNum/2);
    		
    			for($i=$inum; $i>=1; $i--){
    				$page=$this->page-$i;
    
    				if($page<1)
    					continue;
    
    				$linkPage.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";
    
    			}
    		
    			$linkPage.=" {$this->page} ";
    			
    
    			for($i=1; $i<=$inum; $i++){
    				$page=$this->page+$i;
    				if($page<=$this->pageNum)
    					$linkPage.=" <a href='{$this->uri}&page={$page}'>{$page}</a> ";
    				else
    					break;
    			}
    
    			return $linkPage;
    		}
    
    		private function next(){
    			if($this->page==$this->pageNum)
    				$html.='';
    			else
    				$html.="  <a href='{$this->uri}&page=".($this->page+1)."'>{$this->config["next"]}</a>  ";
    
    			return $html;
    		}
    
    		private function last(){
    			if($this->page==$this->pageNum)
    				$html.='';
    			else
    				$html.="  <a href='{$this->uri}&page=".($this->pageNum)."'>{$this->config["last"]}</a>  ";
    
    			return $html;
    		}
    
    		private function goPage(){
    			return '  <input type="text" οnkeydοwn="javascript:if(event.keyCode==13){var page=(this.value>'.$this->pageNum.')?'.$this->pageNum.':this.value;location=\''.$this->uri.'&page=\'+page+\'\'}" value="'.$this->page.'" style="width:25px"><input type="button" value="GO" οnclick="javascript:var page=(this.previousSibling.value>'.$this->pageNum.')?'.$this->pageNum.':this.previousSibling.value;location=\''.$this->uri.'&page=\'+page+\'\'">  ';
    		}
    		function fpage($display=array(0,1,2,3,4,5,6,7,8)){
    			$html[0]="  共有<b>{$this->total}</b>{$this->config["header"]}  ";
    			$html[1]="  每页显示<b>".($this->end()-$this->start()+1)."</b>条，本页<b>{$this->start()}-{$this->end()}</b>条  ";
    			$html[2]="  <b>{$this->page}/{$this->pageNum}</b>页  ";
    			
    			$html[3]=$this->first();
    			$html[4]=$this->prev();
    			$html[5]=$this->pageList();
    			$html[6]=$this->next();
    			$html[7]=$this->last();
    			$html[8]=$this->goPage();
    			$fpage='';
    			foreach($display as $index){
    				$fpage.=$html[$index];
    			}
    
    			return $fpage;
    
    		}
    
    	
    	}

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