1、使用mysqli擴(kuò)展庫(kù) 預(yù)處理技術(shù) mysqli stmt 向數(shù)據(jù)庫(kù)添加3個(gè)用戶(hù)

<?php
    //mysqli擴(kuò)展庫(kù) 預(yù)處理技術(shù) mysqli stmt 向數(shù)據(jù)庫(kù)添加3個(gè)用戶(hù)
    //1、創(chuàng)建mysqli對(duì)象
    $mysqli = new MySQLi("localhost","root","root","test");
    if($mysqli->connect_error){
        die($mysqli->conncet_error);
    }
    //2、創(chuàng)建預(yù)編譯對(duì)象
    $sql="insert into user1(name,password,email,age) values(?,?,?,?)";
    $mysqli_stmt=$mysqli->prepare($sql);
    //綁定參數(shù)
    $name="小芳";
    $password="123456";
    $email="xiaofang@126.com";
    $age=18;

    //參數(shù)綁定->給？號(hào)賦值 這里類(lèi)型和順序要一致
    $mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);
    //執(zhí)行
    $b=$mysqli_stmt->execute();
    //繼續(xù)添加
    $name="小楊";
    $password="123456";
    $email="xiaoyang@126.com";
    $age=18;

    //參數(shù)綁定->給？號(hào)賦值 這里類(lèi)型和順序要一致
    $mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);
    //執(zhí)行
    $b=$mysqli_stmt->execute();   
    //繼續(xù)添加
    $name="小G";
    $password="123456";
    $email="xiaoG@126.com";
    $age=18;

    //參數(shù)綁定->給？號(hào)賦值 這里類(lèi)型和順序要一致
    $mysqli_stmt->bind_param("sssi",$name,$password,$email,$age);
    //執(zhí)行
    $b=$mysqli_stmt->execute();   
    if(!$b){
        echo "操作失敗".$mysqli_stmt->error;
    }else{
        echo "操作成功";
    }
    //關(guān)閉預(yù)編譯
    $mysqli_stmt->close();
    $mysqli->close();
?>

2、使用預(yù)處理查詢(xún)id>5的用戶(hù)id name email

<?php
    //使用預(yù)處理查詢(xún)id>5的用戶(hù)id name email
    $mysqli=new MySQLi("localhost","root","root","test");
    if($mysqli->connect_error){
        die($mysqli->connect_error);
    }
    //創(chuàng)建預(yù)編譯對(duì)象
    $sql="select id,name,email from user1 where id>?";
    $mysqli_stmt=$mysqli->prepare($sql);

    $id=5;
    //綁定參數(shù)
    $mysqli_stmt->bind_param("i",$id);
    //綁定結(jié)果集
    $mysqli_stmt->bind_result($id,$name,$email);
    //執(zhí)行
    $mysqli_stmt->execute();
    //取出綁定的值
    while($mysqli_stmt->fetch()){
        echo "<br/>$id--$name--$email";
    }

    //關(guān)閉資源
    //釋放結(jié)果
    $mysqli_stmt->free_result();
    //關(guān)閉與編譯語(yǔ)句
    $mysqli_stmt->close();
    //關(guān)閉連接
    $mysqli->close();
?>

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