php部分--例子：租房子（复选框的全选、数组拼接成字符串、设置复选框的name值、）

1.链接数据库

<?php
include("DBDA.class.php");
$db=new DBDA();
$sql="select * from fangzi";
$attr=$db->Query($sql);

?>

2.建立复选框表单

<form action="" method="post">
<div>区域：<input type="checkbox" onclick="quanxuan1(this)">全选</div>
<div>
<?php 

foreach($attr as $v)
{
    echo "<input type='checkbox' name='area[]' class='area' value='{$v[2]}'>{$v[2]}";//设置name=area[]是数组，因为有很多个复选框，所以要把它的名字设置为数组，设置class名，为了下面js改变它的属性，给它设置value，为了下面能都取到它的值，进行查询
    
    }


?>
</div><br>

<div>租赁类型：<input type="checkbox" onclick="quanxuan2(this)">全选</div>
<div>
<?php 
foreach($attr as $v)
{
    echo "<input type='checkbox' name='zu[]' class='zu' value='{$v[5]}'>{$v[5]}";
    
    }


?>
</div><br>

<div>房屋类型：<input type="checkbox" onclick="quanxuan3(this)">全选</div>
<div>
<?php 
foreach($attr as $v)
{
    echo "<input type='checkbox' name='fangwu[]' class='fangwu' value='{$v[6]}'>{$v[6]}";
    
    }


?>
</div><br>

<div>关键字：<input type="text" name="guanjianzi"></div>

<div><input type="submit" value="搜索"></div>
</form>

3.列表的显示

<table width="80%" border="1" cellpadding="0" cellspacing="0">
<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
$tiaojian1=" 1=1 ";
$tiaojian2=" 1=1 ";
$tiaojian3=" 1=1 ";
$tiaojian4=" 1=1 ";

if(!empty($_POST["area"])){
    $attr1=$_POST["area"];        //通过area取到的是数组
    $str1=implode("','",$attr1);  //把数组拼接成字符串 因为sql语句中例如 select * from login code in('','','','');,所以用‘，’作为拼接符号把数组拼接成字符串
    $tiaojian1=" area in ('$str1')";//直接把上面的字符串写到条件里
}
if(!empty($_POST["zu"])){
    $attr2=$_POST["zu"];
    $str2=implode("','",$attr2);
    $tiaojian2=" zulinleixing in ('$str2')";
}
if(!empty($_POST["fangwu"])){
    $attr3=$_POST["fangwu"];
    $str3=implode("','",$attr3);
    $tiaojian3=" fangwuleixing in ('$str3')";
}
if(!empty($_POST["guanjianzi"])){
    $str4=$_POST["guanjianzi"];
    $tiaojian4=" keyword like '%{$str4}%'";
}
$sql1="select * from fangzi where {$tiaojian1} and {$tiaojian2} and {$tiaojian3} and {$tiaojian4}";//把各个条件拼起来
$zattr=$db->Query($sql1);
foreach($zattr as $zv)
{
    echo "<tr><td>{$zv[1]}</td><td>{$zv[2]}</td><td>{$zv[3]}</td><td>{$zv[4]}</td><td>{$zv[5]}</td><td>{$zv[6]}</td></tr>";
    
    }
?>
</table>

4.通过js控制全选的选中状态

<script>
function quanxuan1(aa)
{
    
        var attr=document.getElementsByClassName("area");
        for(var i=0;i<attr.length;i++)
        {
            if(aa.checked)                //判断全选复选框的选中状态
            {
            attr[i].setAttribute("checked","checked");    给各个小复选框添加cheched=checked的属性
            
            }
            else
            {
                attr[i].removeAttribute("checked");   //给各个小复选框移除checked属性
                
                }
        }
    }

function quanxuan2(aa)
{
    
        var attr=document.getElementsByClassName("zu");
        for(var i=0;i<attr.length;i++)
        {
            if(aa.checked)
            {
            attr[i].setAttribute("checked","checked");
            
            }
            else
            {
                attr[i].removeAttribute("checked");
                
                }
        }
    }
function quanxuan3(aa)
{
    
        var attr=document.getElementsByClassName("fangwu");
        for(var i=0;i<attr.length;i++)
        {
            if(aa.checked)
            {
            attr[i].setAttribute("checked","checked");
            
            }
            else
            {
                attr[i].removeAttribute("checked");
                
                }
        }
    }





</script>