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  • mysql扩展库应用---在线词典程序范例

    1,在mysql中创建数据表words。

    create table words(
        id int primary key not null auto_increment,
        enword varchar(32) character set utf8 not null,
        chword varchar(32) character set utf8 not null
    );

    2,编写数据库类,有以下代码可见,数据库类的封装不彻底,比如连接的关闭,需要调用后。自己手动关闭。

    <?php
    class SqlTool {
        private $conn = null;
        private $host = "127.0.0.1";
        private $user = "root";
        private $password = "123456";
        private $db = "test";
    
        //mysql扩展库操作mysql数据库步骤如下
        public function __construct(){
            //1.获取连接
            $this->conn = mysql_connect($this->host,$this->user,$this->password) or  die('连接错误:'.mysql_error());
            //2.选择数据库
            mysql_select_db($this->db,$this->conn) or die('选择数据库出错:'.mysql_error());
            //3.设置操作编码(建议有)
            mysql_query("set names utf-8");
    
        }
    
        //对数据表的查询操作
        public function execute_dql($sql){
            $rs = mysql_query($sql,$this->conn) or die('数据库查询失败:'.mysql_error());
            $rsList = array();
            if($rs){
                while($row = mysql_fetch_assoc($rs)){
                    $rsList[] = array('id ' => $row['id'], 'enword'=> $row['enword'],'chword'=> $row['chword']);
                }
            }
            mysql_free_result($rs);
            return $rsList;
        }
    
        //对数据表的增删改操作
        public function execute_dml($sql){
            $rs = mysql_query($sql,$this->conn);
            if(!$rs){
                echo '数据库操作失败:'.mysql_error()."
    ";
                $b = 0; //表示失败
            }else{
                if(mysql_affected_rows($this->conn) > 0){
                    $b = 1; //数据表有变动
                }else{
                    $b = 2; //没有影响数据表
                }
            }
            return $b;
        }
    
        //关闭conn连接
        public function closeConn(){
            mysql_close($this->conn);
        }
    }

    3,编写输入页面。

    <html>
    <head>
        <title>在线词典</title>
        <meta http-equiv="content-type" content="text/html;charset=gb2312" />
    </head>
    <body>
        <h1>查询英文</h1>
        <form action="onlineDictionary2.php" method="post">
            请输入英文:<input type="text" name="enword" />
            <input type="hidden" value="search" name="type" />
            <input type="submit" value="查询" />
        </form>
    </body>
    </html>

    4,编写输出页面,调用的查询,查询完毕后,需要关闭资源。

    <?php
    require_once "SqlTool.class.php";
    header("Content-type:text/html;charset=utf-8");
    $en_word = $_POST['enword'];
    if(!isset($en_word)){
        echo "输入为空,请<a href='onlineDictionary1.php'>点击</a>重新查询";
    }
    
    $sql = "select chword from words where enword ='{$en_word}' limit 0,1";
    $sqlTool = new SqlTool();
    $res = $sqlTool->execute_dql($sql);
    if($res && $row=$res[0]){
        echo $row['chword'];
    }else{
        echo "没有合适的翻译!";
    }
    $sqlTool->closeConn();

    5,调用SqlTool.class.php类库,进行增删改操作如下,

    <?php
    require_once "SqlTool.class.php";
    header("Content-type:text/html;charset=utf-8");
    
    $sql = "insert into words(enword,chword) VALUES ('hello','你好')";
    $sqlTool = new SqlTool();
    $res = $sqlTool->execute_dml($sql);
    if($res){
        echo "操作成功!";
    }else{
        echo "操作失败!";
    }
    $sqlTool->closeConn();

     

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  • 原文地址:https://www.cnblogs.com/usa007lhy/p/4929245.html
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