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  • php 条件查询和多条件查询

    条件循环

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head>
    
    <body>
    <form action="Untitled-1.php" method="post">
    <div>
    汽车名称
    <input type="text" name="name" />
    <input type="submit" value="查询" /> 
    </div>
    </form>
    <br />
    
    <table width="100%" border="1" cellpadding="0" cellspacing="0">
    <tr>
    <td>代号</td>
    <td>名称</td>
    <td>系列</td>
    <td>时间</td>
    <td>油耗</td>
    <td>功率</td>
    </tr>
    
    <?php
    include("dbda.class.php");
    $db=new dbda();
    
    $tj="";
    $name="";
    
    if(!empty($_POST))
    {
        $name=$_POST['name'];
        $tj="where name like '%{$_POST['name']}%'";
        }
    $sql="select * from car ".$tj;
    
    $attr=$db->Query($sql);
    
    foreach($attr as $v)
    {
        //处理关键字
        $v[1];$name;
        $re="<span style='color:red'>{$name}</span>";
        $str=str_replace($name,$re,$v[1]);
        
        
        echo "<tr>
        <td>{$v[0]}</td>
        <td>{$str}</td>
        <td>{$v[2]}</td>
        <td>{$v[3]}</td>
        <td>{$v[4]}</td>
        <td>{$v[5]}</td>
        </tr>";
        }
    ?>
    </table>
    </body>
    </html>
    View Code

    多条件查询

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>无标题文档</title>
    </head>
    
    <body>
    <form action="chaxun.php" method="post">
    <div>
    汽车名称
    <input type="text" name="name" />
    系列代号
    <input type="text" name="brand" />
    <input type="submit" value="查询" /> 
    </div>
    </form>
    <br />
    
    <table width="100%" border="1" cellpadding="0" cellspacing="0">
    <tr>
    <td>代号</td>
    <td>名称</td>
    <td>系列</td>
    <td>时间</td>
    <td>油耗</td>
    <td>功率</td>
    </tr>
    
    <?php
    //一般来说做查询的时候:用户不输入任何内容就是查询所有的
    include("dbda.class.php");
    $db=new dbda();
    
    //多条件查询
    $tj1="1=1";
    $tj2="1=1";
    $name="";
    
    if(!empty($_POST))
    {
        if($_POST['name']!="")
        {
            $name=$_POST['name'];
            $tj1=" name like '%{$_POST['name']}%'";
        }
        if($_POST['brand']!="")
        {
            $tj2="brand='{$_POST['brand']}'";
        }
    }
    
    $cxtj=" where ".$tj1." and ".$tj2;
    
    $sql="select * from car ".$cxtj;
    
    echo $sql;
    
    $attr=$db->Query($sql);
    
    foreach($attr as $v)
    {
        $v[1];$name;
        $re="<span style='color:red'>{$name}</span>";
        $str=str_replace($name,$re,$v[1]);
        
        
        echo "<tr>
        <td>{$v[0]}</td>
        <td>{$str}</td>
        <td>{$v[2]}</td>
        <td>{$v[3]}</td>
        <td>{$v[4]}</td>
        <td>{$v[5]}</td>
        </tr>";
        }
    ?>
    </table>
    </body>
    </html>
    View Code
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  • 原文地址:https://www.cnblogs.com/bilibiliganbei/p/5590484.html
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