数据访问查询实例 租房子

Posted navyyouth

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<body>
	<h2>租赁信息</h2><br />
	<div>
    <form action="zufang.php" method="post">
    <div>区       域:
    <input type="checkbox" onclick="CheckAll(this,\'qy\')" />全选</div>
<?php
	require_once "DBDB.class.php";
	$db = new DBDB();
	 
	$sqlqy = "select distinct Area from house";
	$attrqy = $db->Query($sqlqy);
	//var_dump($attrqy);
	 
	foreach($attrqy as $v)
	{
		echo "<input class=\'qy\' type=\'checkbox\' value=\'{$v[0]}\' name=\'qy[]\'/>{$v[0]} ";     
	}
?>
    
    <div><br />租赁类型:<input type="checkbox" onclick="CheckAll(this,\'zl\')"/>全选</div>
    <div>
<?php
 
	$sqlzl = "select distinct RentType from House";
	$attrzl = $db->Query($sqlzl);
	 
	foreach($attrzl as $v)
	{
		echo "<input class=\'zl\' type=\'checkbox\' value=\'{$v[0]}\' name=\'zl[]\'/>{$v[0]} ";     
	}
?>
    </div><br />
     
    <div>房屋类型:<input type="checkbox" onclick="CheckAll(this,\'fw\')"  />全选</div>
    <div>
<?php
 
	$sqlfw = "select distinct HouseType from House";
	$attrfw = $db->Query($sqlfw);
	//var_dump($attrqy);
	 
	foreach($attrfw as $v)
	{
		echo "<input class=\'fw\' type=\'checkbox\' value=\'{$v[0]}\' name=\'fw[]\'/>{$v[0]} ";     
	}
?>
    </div><br />
     
    <div >关  键  字:
    <input type="text" name="keyword" id="key" />
    <br />
    <input type="submit" value="搜索" />
    </form>
 
    <br />
    <br />
    <br />
 
    <table  border="2" width="80%" style="text-align:center;" >
    <tr>
        <td>关键字</td>
        <td>区域</td>
        <td>面积</td>
        <td>租金</td>
        <td>租赁类型</td>
        <td>房屋类型</td>
    </tr>
 
<?php
 
	$tj = "";
	$tj1 = " 1=1 ";//条件恒成立注意空格
	$tj2 = " 1=1 ";
	$tj3 = " 1=1 ";
	$tj4 = " 1=1 ";
	 
	if(!empty($_POST["qy"]))
	{
         // area in (\'\',\'\',\'\',\'\') $attr = $_POST["qy"]; $str = implode("\',\'",$attr);//拼接字符串 $tj1 = " Area in (\'{$str}\')"; } if(!empty($_POST["zl"])) { $attr = $_POST["zl"]; $str = implode("\',\'",$attr); $tj2 = " RentType in (\'{$str}\')"; } if(!empty($_POST["fw"])) { $attr = $_POST["fw"]; $str = implode("\',\'",$attr); $tj3 = " HouseType in (\'{$str}\')"; } if(!empty($_POST["keyword"])) { $attr = $_POST["keyword"]; $tj3 = " keyword like \'%{$attr}%\'"; } $tj = " Where {$tj1} and {$tj2} and {$tj3} and {$tj4}";//Where 前加空格 $sql = "select * from House".$tj;//拼接 $attrall = $db->Query($sql); //var_dump($attrall); foreach($attrall as $v) { echo "<tr> <td>{$v[1]}</td> <td>{$v[2]}</td> <td>{$v[3]}</td> <td>{$v[4]}</td> <td>{$v[5]}</td> <td>{$v[6]}</td> </tr>"; } ?> </table> </div> <script type="text/javascript"> function CheckAll(a,b)//this表示该 { var qx = a.checked; var ck = document.getElementsByClassName(b); for(var i =0;i<ck.length;i++) { ck[i].checked = qx; } } </script> </body>

 

保持选中查询后条件还是在选中状态

<body>
	<h2>租赁信息</h2><br />
	<div>
    <form action="zufang.php" method="post">
    <div>区       域:
    <input type="checkbox" onclick="CheckAll(this,\'qy\')" />全选</div>
<?php
	require_once "DBDB.class.php";
	$db = new DBDB();
	$tj = "";
	$tj1 = "1=1";
	$tj2 = "1=1";
	$tj3 = "1=1";
	$tj4 = "1=1";
	$attr1 = array(); 
	if(!empty($_POST["qy"]))
	{
		$attr1 = $_POST["qy"];
		$str = implode("\',\'",$attr1);
		$tj1 = " Area in (\'{$str}\')";  
	}
	$attr2 = array(); 
	if(!empty($_POST["zl"]))
	{
		$attr2 = $_POST["zl"];
		$str = implode("\',\'",$attr2);
		$tj2 = " RentType in (\'{$str}\')";  
	}
	$attr3 = array(); 
	if(!empty($_POST["fw"]))
	{
		$attr3 = $_POST["fw"];
		$str = implode("\',\'",$attr3);
		$tj3 = " HouseType in (\'{$str}\')"; 
	}
	$attr4 = "";  
	if(!empty($_POST["keyword"]))
	{
		$attr4 = $_POST["keyword"];
		$tj3 = " keyword like \'%{$attr4}%\'";
	}
	 //把if语句拿到上面  拿到复选框的上面,把每个attr拿到花括号外面
	$sqlqy = "select distinct Area from house";
	$attrqy = $db->Query($sqlqy);
	//var_dump($attrqy);
	 
	foreach($attrqy as $v)//加if语句
	{
		if(in_array($v[0],$attr1)){
		//判断$v[0]	是否在数组attr1中  遍历出的$v[0]是否被选中
		echo "<input class=\'qy\' type=\'checkbox\' checked=\'checked\' value=\'{$v[0]}\' name=\'qy[]\'/>{$v[0]} ";
		}else{
			echo "<input class=\'qy\' type=\'checkbox\' value=\'{$v[0]}\' name=\'qy[]\'/>{$v[0]} ";  	
		}   
	}
?>
    
    <div><br />租赁类型:<input type="checkbox" onclick="CheckAll(this,\'zl\')"/>全选</div>
    <div>
<?php
 
	$sqlzl = "select distinct RentType from House";
	$attrzl = $db->Query($sqlzl);
	 
	foreach($attrzl as $v)
	{
		if(in_array($v[0],$attr2)){
			echo "<input class=\'zl\' type=\'checkbox\' checked=\'checked\' value=\'{$v[0]}\' name=\'zl[]\'/>{$v[0]} ";	
		}else{
			echo "<input class=\'zl\' type=\'checkbox\' value=\'{$v[0]}\' name=\'zl[]\'/>{$v[0]} ";
		} 
	}
?>
    </div><br />
     
    <div>房屋类型:<input type="checkbox" onclick="CheckAll(this,\'fw\')"  />全选</div>
    <div>
<?php
 
	$sqlfw = "select distinct HouseType from House";
	$attrfw = $db->Query($sqlfw);
	//var_dump($attrqy);
	 
	foreach($attrfw as $v)
	{
		if(in_array($v[0],$attr3)){
			echo "<input class=\'fw\' type=\'checkbox\' checked=\'checked\' value=\'{$v[0]}\' name=\'fw[]\'/>{$v[0]}";  	
		}else{
			echo "<input class=\'fw\' type=\'checkbox\' value=\'{$v[0]}\' name=\'fw[]\'/>{$v[0]}";
		}
		   
	}
?>
    </div><br />
     
    <div >关  键  字:
    <input type="text" name="keyword" id="key" value=\'<?php echo $attr4; ?>\'/><!--加入一小段php代码-->
    <br />
    <input type="submit" value="搜索"/>
    </form>
 
    <br />
    <br />
    <br />
 
    <table  border="2" width="80%" style="text-align:center;" >
    <tr>
        <td>关键字</td>
        <td>区域</td>
        <td>面积</td>
        <td>租金</td>
        <td>租赁类型</td>
        <td>房屋类型</td>
    </tr>
 
<?php
	$tj = " Where {$tj1} and {$tj2} and {$tj3} and {$tj4}";//Where  前加空格
	 
	$sql = "select * from House".$tj;
	$attrall = $db->Query($sql);
	//var_dump($attrall);
	 
	foreach($attrall as $v)
	{
		echo "<tr>
				<td>{$v[1]}</td>
				<td>{$v[2]}</td>
				<td>{$v[3]}</td>
				<td>{$v[4]}</td>
				<td>{$v[5]}</td>
				<td>{$v[6]}</td>
			</tr>";  
	}
	 
	?>
	 
	</table>
    </div>

<script type="text/javascript">
	function CheckAll(a,b)//this表示该
	{
		var qx = a.checked;
		var ck = document.getElementsByClassName(b);
		for(var i =0;i<ck.length;i++)
		{
			ck[i].checked = qx;
		}
	}
	 
</script>
</body>

 

查询完成条件还是选中状态  和第一个不一样 第一个查询后条件就变为空

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