PHP5.6连接数据库和一些简单操作

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2018/1/23
 * Time: 13:54
 */

/*
 * @method connDb:数据库链接
 * @param:null
 * @return:$conn
 *
 * */
function connDb(){

    $conn=mysqli_connect('p:localhost','root','','ym');
    if (mysqli_connect_errno()){
        printf("Connect failed:5s\n",mysqli_connect_error());
        exit();
    }else{

        return $conn;
    }

}

/*
 * @method updateDb:更新数据库的时间和北方情况
 * @param:null
 * @return:$flag 成功/失败
 *
 * */
function updateDb($now,$die_flag,$conn,$host){

    $arr = array();

    $query="UPDATE domians set die_flag='".$die_flag."', datetime='".$now."' WHERE host='".$host."'";
    //$result = mysqli_query($conn,$query);

    $result=mysqli_query($conn,$query);

    if ($result){

        $arr['stat']="suc";

    }else{
        //echo "更新失败,".$result;
        $arr['stat']="fail";
        $arr['error']=$result;
    }

    echo json_encode($arr);
}

/*
 * @method selectByOldTime:获取未检测的最老域名
 * @param:null
 * @return:$conn
 *
 * */
function selectByOldTime(){

    $arr = array();
    $conn = connDb();
    $sql='select id,host from domians ORDER BY datetime DESC';
    //$sql="select * from domians";

    $result=mysqli_query($conn,$sql);

    if (! $result){

        printf("Error:%s\n",mysqli_error($conn));

        exit();
    }  else{

        //$row=mysqli_fetch_array($result,MYSQL_ASSOC);

        $row= mysqli_fetch_assoc($result);

        mysqli_close($conn);

        //echo $row['host'];


        $arr['id'] = $row['id'];
        $arr['host'] = $row['host'];

        echo json_encode($arr);


        //return $row['host'];
    }
}


function insertDb(){

    $mysql_table="domians";

    $conn = connDb();

    $host="www.baidu.com";

    $sql_insert="insert into $mysql_table(host,die_flag,datetime) VALUE ('".$host."',0,'".time()."')";
    echo $sql_insert;
    if (mysqli_query($conn,$sql_insert)){

        echo "插入成功";
    }else{
        echo "插入失败".mysqli_error($conn);
    }

    mysqli_close($conn);
}

$value=null;
$getHost=null;
if (isset($_GET["action"])){
    $value= $_GET["action"];
}
if (isset($_GET['host'])){
    $getHost= $_GET["host"];
}

if ($value!=null){

    switch ($value)
    {
        case "select":

            selectByOldTime();
            break;

        case "updatetime":

            if ($getHost==null){

                echo "域名未指定";
                exit();
            }

            updateDb(time(),0,$conn,$getHost);

            break;

        case "updatedie_flag":

            if ($getHost==null){

                echo "域名未指定";
                exit();
            }
            updateDb(time(),1,$conn,$getHost);

        default:
            echo "action不存在的，相信我！";
    }
}else{
    echo "action未指定";
}

/*
while ($row=mysqli_fetch_assoc($result)){
    echo $row['id']."______".$row['username'].'<br/>';
}*/
PHP5.6连接数据库和一些简单操作

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