Question

我试图根据本教程https://www.youtube.com/watch?v=9zxfoamp-xc制作包含MySQL数据库更新数据的动态图表，但屏幕上没有任何内容。没有图表生成。

datos.php

id="submitbutton"

json输出

[{＆＃34; X＆＃34;：＆＃34; 0＆＃34;＆＃34; Y＆＃34;：＆＃34; 2＆＃34;}，{＆＃34; X＆＃34 ;：＆＃34; 5＆＃34;＆＃34; Y＆＃34;：＆＃34; 3＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 10＆＃34;，＆＃34; Y＆＃34;：＆＃34; 3＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 15＆＃34;＆＃34; Y＆＃34;：＆＃34; 3＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 20＆＃34;＆＃34; Y＆＃34;：＆＃34; 4＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 30＆＃34;＆＃34; Y＆＃34;：＆＃34; 3＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 35＆＃34; ＆＃34; Y＆＃34;：＆＃34; 5＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 40＆＃34;＆＃34; Y＆＃34;：＆＃ 34; 4＆＃34;}，{＆＃34; X＆＃34;：＆＃34; 45＆＃34;＆＃34; Y＆＃34;：＆＃34; 3＆＃34;}]

的index.html

<?php
$pdo=new PDO("mysql:dbname=basededatoslocal;host=127.0.0.1","root","");

if(isset($_GET['Consultar']) && $_GET['Consultar']=='1'){
            $statement=$pdo->prepare("SELECT valorx as x, valory as y FROM medidas ORDER BY id DESC LIMIT 0,1");
            $statement->execute();
            $results=$statement->fetchAll(PDO::FETCH_ASSOC);
            $json=json_encode($results);
            echo $json;
}
else
{
        // Buscar Todos los datos

            $statement=$pdo->prepare("SELECT valorx as x, valory as y FROM medidas ORDER BY id ASC");
            $statement->execute();
            $results=$statement->fetchAll(PDO::FETCH_ASSOC);
            $json=json_encode($results);

            echo $json;
}


?>

我希望有人可以帮助我。

谢谢，保罗

Answer 1

本教程的作者帮助了我。我只发布datos.php工作代码，因为上一篇文章中的index.html没问题。也许它有助于某人：）

<?php
error_reporting(0);
header('Content-Type: application/json');
$pdo=new PDO("mysql:dbname=basededatoslocal;host=127.0.0.1","root","");
switch($_GET['Consultar']){
        // Buscar Último Dato
        case 1:
            $statement=$pdo->prepare("SELECT valorx as x, valory as y FROM medidas ORDER BY id DESC LIMIT 0,1");
            $statement->execute();
            $results=$statement->fetchAll(PDO::FETCH_ASSOC);
            $json=json_encode($results);
            echo $json;
        break; 
        // Buscar Todos los datos
        default:

            $statement=$pdo->prepare("SELECT valorx as x, valory as y FROM medidas ORDER BY id ASC");
            $statement->execute();
            $results=$statement->fetchAll(PDO::FETCH_ASSOC);
            $json=json_encode($results);
            echo $json;
        break;
}
?>

使用Highcharts与MySQL数据库中的数据的动态图表

1 个答案: