Implement PHP security authentication using Firebase Phone Authentication

Use Firebase Phone Authentication to implement PHP security verification

Overview:
When developing web applications, security verification is a very important link. To ensure user identity and data security, we need to authenticate users when they log in or perform sensitive operations. Firebase Phone Authentication is a powerful authentication solution that can help us implement mobile phone number verification. This article will introduce how to use Firebase Phone Authentication and PHP to implement security verification.

Step 1: Preparation

1. Register a Firebase account and create a new Firebase project.
2. In the Firebase console, enable the "Phone Authentication" feature.

3. Create a web page and introduce Firebase's JavaScript SDK.

   <script src="https://www.gstatic.com/firebasejs/7.8.1/firebase-app.js"></script>
   <script src="https://www.gstatic.com/firebasejs/7.8.1/firebase-auth.js"></script>

Step 2: Integrate Firebase Phone Authentication

1. Create a PHP file to handle operations related to Firebase Phone Authentication, such as sending Firebase sends verification codes, verifies verification codes, etc. We will use the REST API provided by Firebase for communication.

   <?php
    $phone_number = $_POST['phone_number'];
    $recaptcha_token = $_POST['recaptcha_token'];
   
    $request_body = [
        'phoneNumber' => $phone_number,
        'recaptchaToken' => $recaptcha_token
    ];
   
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, 'https://identitytoolkit.googleapis.com/v1/accounts:sendOobCode?key=[YOUR_API_KEY]');
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($request_body));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
   
    $response = curl_exec($ch);
    curl_close($ch);
   
    echo $response;
   ?>

   Note: [YOUR_API_KEY] in the above code needs to be replaced with the API key you generated in the Firebase console.

Step 3: Front-end code writing

1. Create a text box and button on the web page to enter the mobile phone number and trigger the sending of the verification code operation.

   <input type="text" id="phone_number_input">
   <button onclick="sendVerificationCode()">发送验证码</button>

2. Create a JavaScript function to handle the event of clicking the button and send the mobile phone number to the server.

   function sendVerificationCode() {
    var phoneNumber = document.getElementById('phone_number_input').value;
    var recaptchaToken = 'YOUR_RECAPTCHA_TOKEN';
   
    var request = new XMLHttpRequest();
    request.open('POST', 'path/to/your/php/file.php');
    request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
   
    request.onreadystatechange = function() {
        if (request.readyState === XMLHttpRequest.DONE && request.status === 200) {
            var response = JSON.parse(request.responseText);
            if (response.hasOwnProperty('error')) {
                console.log('发送验证码失败：' + response.error.message);
            } else {
                console.log('验证码已发送，请查收。');
            }
        }
    }
   
    var requestBody = 'phone_number=' + encodeURIComponent(phoneNumber) + '&recaptcha_token=' + encodeURIComponent(recaptchaToken);
    request.send(requestBody);
   }

   Note: YOUR_RECAPTCHA_TOKEN in the above code needs to be replaced with your reCAPTCHA site key to prevent malicious operations.

Step 4: Verify the verification code

1. Create another text box and button on the web page to enter the verification code and trigger verification verification Code operations.

   <input type="text" id="verification_code_input">
   <button onclick="verifyVerificationCode()">验证验证码</button>

2. Create a JavaScript function to handle the button click event and send the verification code to Firebase for verification.

   function verifyVerificationCode() {
    var verificationCode = document.getElementById('verification_code_input').value;
   
    var credential = firebase.auth.PhoneAuthProvider.credential(window.confirmationResult.verificationId, verificationCode);
    firebase.auth().signInWithCredential(credential)
        .then(function() {
            console.log('验证成功！'); // 验证成功后的操作
        })
        .catch(function(error) {
            console.log('验证失败：' + error.message);
        });
   }

So far, we have completed all the steps to use Firebase Phone Authentication to implement PHP security verification. Now, when the user clicks the "Send Verification Code" button, the verification code will be sent to the user's phone. After the user enters the verification code, click the "Verify Verification Code" button to verify.

Summary:
Firebase Phone Authentication provides a simple and powerful way to implement PHP security verification. By combining PHP and Firebase’s REST API, we can easily implement user authentication and keep users’ data secure in our application. Hope this article is helpful to you!

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