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php - 将 Python 输出发送到 HTML 字段

问题描述

我目前正在使用 Raspberry Pi 做一个简单的项目。我有一个简单的 Apache 2 服务器正在运行，带有 MySQL 和几个 PHP/HTML 页面。其中一页是下面调用barcode.php 的一页。在barcode.php 上，您在user_id 字段中输入User_ID，然后按回车键或按查找按钮，它将在数据库中搜索该用户并显示该用户信息和图片。

以上所有操作都可以手动操作，甚至可以通过扫描二维码使用条形码扫描仪。现在，我想集成一个 RFID 阅读器（RFID READER RC522）。当用户在读卡器上扫描他/她的卡时，我希望它像条形码扫描仪一样工作，并在 user_id 字段中输入数字代码，然后按 Enter，这样页面就可以返回用户数据。

我对此很陌生。我怎样才能在我的barcode.php中实现它？用户扫描的地方，它会将其放在 user_id 字段中。

这是barcode.php：

    <?php
        // Initialize the variables
        $user_id   = "";
        $osha      = "";
        $firstname = "";
        $lastname  = "";
        $company   = "";
        $trade     = "";
        $email     = "";
        $picture   = "";
        $reg_date   = "";

        // PHP code to search data in a MySQL database and set it in input text
        if(isset($_POST['search']))
        {
            // Connect to MySQL
            $dbc = mysqli_connect("127.0.0.1", "root", "1234", "demodb");

            // id to search
            $user_id = mysqli_real_escape_string($dbc, $_POST['user_id']);

            $query = "SELECT * FROM Users WHERE user_id = '$user_id' LIMIT 1";
            $rs    = mysqli_query($dbc, $query);
            if (mysqli_num_rows($rs) == 1)
            {
                $row       = mysqli_fetch_array($rs);
                $osha      = $row['osha'];
                $firstname = $row['firstname'];
                $lastname  = $row['lastname'];
                $company   = $row['company'];
                $trade     = $row['trade'];
                $email     = $row['email'];
                $picture   = $row['picture'];
                $reg_date  = $row['reg_date'];

                $query1     = "INSERT INTO scan (user_id, osha, firstname, lastname, company, trade, email, picture) VALUES (" .
                        "'" . $user_id . "'," .
                      "'" . mysqli_real_escape_string($dbc, $osha     ) . "', " .
                      "'" . mysqli_real_escape_string($dbc, $firstname) . "', " .
                      "'" . mysqli_real_escape_string($dbc, $lastname ) . "', " .
                      "'" . mysqli_real_escape_string($dbc, $company  ) . "', " .
                      "'" . mysqli_real_escape_string($dbc, $trade  ) . "', " .
                      "'" . mysqli_real_escape_string($dbc, $email  ) . "', " .
                      "'" . mysqli_real_escape_string($dbc, $picture    ) . "')";
                        mysqli_query($dbc, $query1);
            }
            else
            {
                echo "Undefined ID";
            }
        }
    ?>

    <!DOCTYPE html>
    <html lang="en">
    <head>
        <title>User Search</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!--===============================================================================================-->
                <link rel="icon" type="image/png" href="images/icons/favicon.ico"/>
        <!--===============================================================================================-->
                <link rel="stylesheet" type="text/css" href="vendor/bootstrap/css/bootstrap.min.css">
        <!--===============================================================================================-->
                <link rel="stylesheet" type="text/css" href="fonts/font-awesome-4.7.0/css/font-awesome.min.css">
        <!--===============================================================================================-->
                <link rel="stylesheet" type="text/css" href="vendor/animate/animate.css">
        <!--===============================================================================================-->
                <link rel="stylesheet" type="text/css" href="vendor/css-hamburgers/hamburgers.min.css">
        <!--===============================================================================================-->
                <link rel="stylesheet" type="text/css" href="vendor/select2/select2.min.css">
        <!--===============================================================================================-->
                <link rel="stylesheet" type="text/css" href="css/util.css">
                <link rel="stylesheet" type="text/css" href="css/main.css">
        <!--===============================================================================================-->

        <style>
            .button {
                background-color: #4CAF50;
                border: none;
                color: white;
                padding: 15px 32px;
                text-align: center;
                text-decoration: none;
                display: inline-block;
                font-size: 16px;
                margin: 4px 2px;
                cursor: pointer;
            }
        </style>
    </head>

    <body>
        <div class="contact1">
            <div class="container-contact1">
                <div class="contact1-pic js-tilt" data-tilt>

                    <?php echo "<img src= '$picture' height='400' width='400' alt='Image not found' onerror=this.onerror=null;this.src='images/scanbarcode.png';  >" ?>

                </div>

                <form action="barcode.php" method="post">
                    <div class="wrap-input1 validate-input" data-validate = "SCAN ID TO SEARCH">
                    <input class="input1" type="text" name="user_id" placeholder="SCAN ID TO SEARCH" autofocus>
                    <span class="shadow-input1"></span>
            </div>

            <div class="wrap-input1 validate-input" >
                <input class="input1" type="text" name="osha" placeholder="OSHA #" value="<?= htmlspecialchars($osha) ?>">
                <span class="shadow-input1"></span>
            </div>

            <div class="wrap-input1 validate-input" >
                <input class="input1" type="text" name="firstname" placeholder="First Name"  value="<?= htmlspecialchars($firstname) ?>">
                <span class="shadow-input1"></span>
            </div>

            <div class="wrap-input1 validate-input" >
                <input class="input1" type="text" name="lastname" placeholder="Last Name"  value="<?= htmlspecialchars($lastname) ?>">
                <span class="shadow-input1"></span>
            </div>

            <div class="wrap-input1 validate-input" >
                <input class="input1" type="text" name="company" placeholder="Company Name"  value="<?= htmlspecialchars($company) ?>">
                <span class="shadow-input1"></span>
            </div>

            <div class="wrap-input1 validate-input" >
                <input class="input1" type="text" name="trade" placeholder="Trade Name"  value="<?= htmlspecialchars($trade) ?>">
                <span class="shadow-input1"></span>
            </div>

            <input type="button" onclick="window.location='auth.php'" class="button" value="Admin"/>

            <input type="submit" name="search" value="Find" class="button" >

            </form>

        </div>
    </div>

    <!--===============================================================================================-->
            <script src="vendor/jquery/jquery-3.2.1.min.js"></script>
    <!--===============================================================================================-->
            <script src="vendor/bootstrap/js/popper.js"></script>
            <script src="vendor/bootstrap/js/bootstrap.min.js"></script>
    <!--===============================================================================================-->
            <script src="vendor/select2/select2.min.js"></script>
    <!--===============================================================================================-->
            <script src="vendor/tilt/tilt.jquery.min.js"></script>

            <script >
                    $('.js-tilt').tilt({
                            scale: 1.1
                    })
            </script>
    </body>
    </html>

这是名为 Read.py 的简单 Python 脚本

#!/usr/bin/env python

import RPi.GPIO as GPIO
import SimpleMFRC522
import MFRC522
import signal

continue_reading = True

reader = SimpleMFRC522.SimpleMFRC522()

def end_read(signal,frame):
    print "Ctrl+C captured, ending read."
    continue_reading = False
    GPIO.cleanup()

signal.signal(signal.SIGINT, end_read)

MIFAREReader = MFRC522.MFRC522()

while continue_reading:
    id, text = reader.read()
    print(id)
    print(text)

在终端上，当扫描一张卡片时，它会返回以下数据：

pi@raspberrypi:/var/www/html/app/RFID/SPI-Py/MFRC522-python $ sudo python Read1.py
140248588882

我想将该数字数据 (140248588882) 发送到我的barcode.php 页面中的 user_id 字段。我怎样才能做到这一点？

标签： phppythonhtmlraspberry-pi

解决方案

您需要一个客户端将文本插入 Web 浏览器，这不是 PHP 问题。

通常，条形码扫描仪将充当 HID，因此无论您扫描什么东西，它似乎都会输入数字并按 Enter。您可以插入充当 HID 的备用 RFID 阅读器，或从 python 模拟键盘事件。

  • 整理权限或传递数据，这样您就可以在没有 sudo 的情况下获得 RFID 输入：要创建键盘事件，您应该像您自己一样在图形会话下运行。
  • 从 python调用类似 xte 的东西，它是 Debian xautomation 软件包的一部分。

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