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利用PHP访问数据库——实现分页功能与多条件查询…

2018-06-22 05:27:31来源：未知阅读 ()

1.实现分页功能

<body>
<table width="100%" border="1">
<thead>
    <tr>
      <th>代号</th>
      <th>名称</th>
      <th>价格</th>
    </tr>
</thead>
<tbody>
   <?php
   require_once "./DBDA.class.php";　　//加载数据库访问类的封装文件
   require_once "page.class.php";　　//加载分页类的封装文件
   $db = new DBDA();
   $sql = "select count(*) from car";
   $arr = $db->query($szts);

   $page = new Page($arr[0][0],5);　　//查看总数据，并每页显示的行数据
   $sql = "select * from car".$page->limit;　　//拼接每页显示的数据
   $arr = $db->query($sql);
   foreach($arr as $v){
       echo "<tr>
      <td>{$v[0]}</td>
      <td>{$v[1]}</td>
      <td>{$v[2]}</td>
    </tr>";
   }
   ?>
</tbody>
</table>

<div style="margin-top:20px">
   <?php
   echo $page->fpage();　　//调用分页类的方法
   ?>
</div>
</body>

2.实现多条件查询功能

<body>
<?php
require_once "./DBDA.class.php";
require_once "page.class.php";
$db = new DBDA();

//做一个恒成立的条件
$tj = " 1=1 ";
$tj2 = " 1=1 ";
$name = " ";
$brand = " ";
//当提交的数据不为空，需要改条件
if(!empty($_GET["name"])){
   $name = $_GET["name"];
   $tj = " name like '%{$name}%' ";　　//使用模糊查询查询关键信息
}
if(!empty($_GET["brand"])){
   $brand = $_GET["brand"];
   $tj2 = " brand = '{$brand}' ";
}

?>
<table width="100%" border="1">
<form action="test.php" method="get">
<input type="text" name="name" placeholder="请输入名称" value="<?php echo $name ?>" style="max-width:200px; float:left">
<input type="text" name="brand" placeholder="请输入系列" value="<?php echo $brand ?>" style="max-width:200px; float:left">
<button type="submit" style="float:left; margin-left:10px">查询</button>
</form>
<thead>
    <tr>
      <th>代号</th>
      <th>名称</th>
      <th>系列</th>
      <th>时间</th>
      <th>价格</th>
    </tr>
</thead>
<tbody>
   <?php
   $zts = "select count(*) from car where {$tj} and {$tj2}";　　//多条件查询数据总数
   $ats = $db->query($arr);
   $page = new Page($ats[0][0],2);

   $sql = "select * from car where {$tj} and {$tj2} ".$page->limit;
   $arr = $db->query($sql);
   foreach($arr as $v){
        //给查询的关键字加字体颜色
       $n = str_replace($name,"<span style='color:red'>{$name}</span>",$v[1]);
       echo "<tr>
      <td>{$v[0]}</td>
      <td>{$n}</td>
      <td>{$v[2]}</td>
      <td>{$v[3]}</td>
      <td>{$v[7]}</td>
    </tr>";
   }
   ?>
</tbody>
</table>
<div>
<?php
echo $page->fpage();
?>
</div>
</body>