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PHP+MySQL删除操作实例,phpmysql删除实例
删除记录
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PHP+MySQL删除操作实例,phpmysql删除实例

Jun 16, 2016 am 09:16 AM
mysql php delete

PHP+MySQL删除操作实例,phpmysql删除实例

本文实例讲述了PHP+MySQL删除操作的使用技巧。分享给大家供大家参考。具体如下:

复制代码 代码如下:


删除记录

 
    //连接数据库的参数 
    $host = "localhost"; 
    $user = "root"; 
    $pass = "zq19890319"; 
    $db = "phpdev"; 
    //创建mysqli对象 
    //打开一个数据库连接 
    $mysqli = new mysqli($host, $user, $pass, $db); 
    //检查连接错误 
    if(mysqli_connect_errno()){ 
        die("Unable to connect!"); 
    } 
    //如果记录ID存在,则执行删除操作 
    if(isset($_GET['id'])){ 
        //构造删除记录的SQL 
        $query = "DELETE FROM symbols WHEREid = ".$_GET['id']; 
         
        //执行SQL查询 
        if($mysqli->query($query)){ 
            //显示删除后影响的记录数 
            echo $mysqli->affected_rows. "row(s) affected"; 
        } 
        else 
        { 
            //如果没有匹配的记录,显示数据库返回的错误信息 
            echo "Error in query : $query. ".$mysqli->error; 
        } 
    } 
    //构造显示删除后的记录 
    $query = "SELECT * FROM symbols"; 
    //执行该查询 
    if($result=$mysqli->query($query)){ 
        //显示返回的记录集行数 
        if($result->num_rows>0){ 
            //如果有记录 
            //显示记录集中列的内容 
            echo ""; 
            while($row=$result->fetch_array()){ 
                echo ""; 
                echo ""; 
                echo ""; 
                echo ""; 
                echo ""; 
                echo ""; 
            } 
        } 
        //释放对象所占用的内存 
        $result->close(); 
    } 
    else 
    { 
        //输出数据库错误的信息 
        echo "Error in query: $query. ".$mysqli->error; 
    } 
    //关闭数据库 
    $mysqli->close(); 
?>

希望本文所述对大家的php程序设计有所帮助。

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