phpStudy7——MySql数据库的增删查改

 1     //添加数据
 2 
 3     $strsql = "insert into user_info(userId,userName,phoneNumber,userScore,dataTime) values(null,‘$name‘,‘$phone‘,‘$score‘,now())";
 4     $result = @mysql_query($strsql);
 5     
 6     //成功添加
 7     if($result)
 8     {
 9         echo true;
10     }else{
11         echo false;
12     }

 1     //查询用户数据并返回用户数组对象    
 2     $strSql = "SELECT * FROM user_info"; //SQL查询语句
 3     mysql_query("SET NAMES utf8");
 4     $result = mysql_query($strSql); //获取数据集
 5     
 6     $users;$user;$i=0;
 7     while($row=mysql_fetch_array($result))
 8     {
 9         $user["userId"]=$row["userId"];
10         $user["userName"]=$row["userName"];
11         $user["phoneNumber"]=$row["phoneNumber"];
12         $user["userScore"]=$row["userScore"];
13         $user["dataTime"]=$row["dataTime"];
14         $users[$i++]=$user;
15     }
16     //echo $strSql;
17     echo urldecode(json_encode($users));

    //记数查询，返回数据条数
    $strSql = "select count(*) from user_info"; //SQL查询语句
    mysql_query("SET NAMES utf8");
    $result = mysql_query($strSql); //获取数据集
    $row=mysql_fetch_array($result);
    echo $row[0];

//更新数据
$query="update question set question=‘$question‘,answer1=‘$answer1‘,answer2=‘$answer2‘,answer3=‘$answer3‘,answer4=‘$answer4‘,result=$result where id=$id";
$rs=mysql_query($query);//执行查询
if($rs){
    echo true;
}else{
    echo false;
}