php mysql数据库分页与搜索

Posted 2020-08-05

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<?php
/**
 * Created by coder meng.
 * User: coder meng
 * Date: 2016/8/29 10:27
 */
header("Content-type:text/html;charset=utf-8");
include_once ‘config.php‘;

/*$sql="select * from article ";
$rs=mysql_query($sql);*/
$where=‘‘;
$url=‘‘;
$wherelist=array();
$urllist="";
if(!empty($_GET[‘author‘])){
    $author=$_GET[‘author‘];
    $wherelist[]="author like ‘%$author%‘";
    $urllist[]="&author=$author";
}
if(!empty($_GET[‘title‘])){
    $title=$_GET[‘title‘];
    $wherelist[]="title like ‘%$title%‘";
    $urllist[]="&title=$title";
}
if(!empty($_GET[‘content‘])){
    $content=$_GET[‘content‘];
    $wherelist[]="content like ‘%$content%‘";
    $urllist[]="&content=$content";
}

if(count($wherelist)>0){
    $where=‘ where ‘.implode(‘ and ‘,$wherelist);
    $url=implode(‘‘,$urllist);
}

$sql2="select * from article $where ";
$rs=mysql_query($sql2);
//$sql1="select * from article $limit";  // (1-1)*10
// 2， 共多少页 = 总记录数/每页条数
$totlanums=mysql_num_rows($rs); // 101  符合的  13
// 1， 每页条数
$pagesize=2;
//共多少页
$maxpage=ceil($totlanums/$pagesize);//最大页码 也是总页数
$page=isset($_GET[‘page‘])?$_GET[‘page‘]:1;
if($page<1){
    $page=1;
}
if($page>$maxpage){
    $page=$maxpage;
}
$start=($page-1)*$pagesize;
$limit ="limit $start,$pagesize";
$sql3="select * from article $where $limit";
$rs3=mysql_query($sql3);
$arr=array();

//分页的原理

/*while($row = mysql_fetch_assoc($rs)){
    $arr[] =$row;
}*/

/*$sql1="select * from article limit 10,10"; //(1-1)*10
$sql1="select * from article limit 20,10"; //(1-1)*10*/

?>
<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<div style="width: 600px;margin: 0 auto;">
    <form action="pagelist.php" method="get">
        <table border="1" width="600">
            <tr>
              <td>作者：<input type="text" name="author" value="<?php echo isset( $_GET[‘author‘])?$_GET[‘author‘]:‘‘;?>"></td> 
              <td>标题：<input type="text" name="title" value="<?php echo isset( $_GET[‘title‘])?$_GET[‘title‘]:‘‘;?>"></td>                
              <td>内容：<input type="text" name="content" value="<?php echo isset( $_GET[‘content‘])?$_GET[‘content‘]:‘‘;?>"></td>                
              <td><input type="submit" value="搜索"></td>            
           </tr>        
       </table>    
</form>    
<table border="1" width="600">        
      <tr>            
           <td>编号</td>  
           <td>作者</td> 
           <td>标题</td> 
           <td>内容</td> 
           <td>操作</td>
      </tr>
        <?php while($row = mysql_fetch_assoc($rs3)){ ?> 
      <tr>                
          <td><?php echo $row[‘id‘]?></td> 
          <td><?php echo $row[‘author‘]?></td>  
          <td><?php echo $row[‘title‘]?></td>    
          <td><?php echo $row[‘content‘]?></td>              
          <td>编辑|删除</td>            
     </tr>        
         <?php } ?>        
     <tr>           
           <td colspan="5" align="center">   
           <?php          
               echo "当前第{$page}页/{$maxpage},共{$totlanums}条记录";     
           if($page>1){          
                 echo "<a href=‘pagelist.php?page=1$url‘>首页</a>";    
                 echo "<a href=‘pagelist.php?page=".($page-1)."$url‘>上一页</a>";       
                     }              
          if($page<$maxpage){          
                 echo "<a href=‘pagelist.php?page=".($page+1)."$url‘>下一页</a>";     
                 echo "<a href=‘pagelist.php?page=$maxpage{$url}‘>尾页</a>";         
                    }              
            ?>          
           </td>     
     </tr>
   </table>  
  </div>

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