darkcolonist · January 23, 2019 06:50
diff --git a/index.php b/index.php
 <?php
  if(isset($_POST["firstname"])){
    echo "<pre>";
    echo print_r($_POST, true);
    echo "</pre>";

    require("recaptchalib.php");
    /**
     * user your own private key here!!!
     * @var string
     */
    $privatekey = "---YOUR-PRIVATE-KEY-HERE---";

    $response = $_POST["g-recaptcha-response"];
    $verify = new recaptchalib($privatekey, $response);

    if ($verify->isValid() == false) {
      die('you are a robot, nothing to do here...');
    } else {
      // Your code here to handle a successful verification
      die('you are not a robot, sending message...');
    }
  }
 ?>
 <html>
  <head>
    <title>recaptcha tester</title>
    <style>
      /* Style inputs with type="text", select elements and textareas */
      input[type=text], select, textarea {
        width: 100%; /* Full width */
        padding: 12px; /* Some padding */  
        border: 1px solid #ccc; /* Gray border */
        border-radius: 4px; /* Rounded borders */
        box-sizing: border-box; /* Make sure that padding and width stays in place */
        margin-top: 6px; /* Add a top margin */
        margin-bottom: 16px; /* Bottom margin */
        resize: vertical /* Allow the user to vertically resize the textarea (not horizontally) */
      }

      /* Style the submit button with a specific background color etc */
      input[type=submit] {
        background-color: #4CAF50;
        color: white;
        padding: 12px 20px;
        border: none;
        border-radius: 4px;
        cursor: pointer;
      }

      /* When moving the mouse over the submit button, add a darker green color */
      input[type=submit]:hover {
        background-color: #45a049;
      }

      /* Add a background color and some padding around the form */
      .container {
        border-radius: 5px;
        background-color: #f2f2f2;
        padding: 20px;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <form action="index.php" method="post">

        <label for="fname">First Name</label>
        <input type="text" id="fname" name="firstname" placeholder="Your name..">

        <label for="lname">Last Name</label>
        <input type="text" id="lname" name="lastname" placeholder="Your last name..">

        <label for="country">Country</label>
        <select id="country" name="country">
          <option value="australia">Australia</option>
          <option value="canada">Canada</option>
          <option value="usa">USA</option>
        </select>

        <label for="subject">Subject</label>
        <textarea id="subject" name="subject" placeholder="Write something.." style="height:200px"></textarea>

        <!-- use your own site key here!!! -->
        <div class="g-recaptcha" data-sitekey="---YOUR-PUBLIC-KEY-HERE---"></div>

        <input type="submit" value="Submit">

      </form>
    </div>
    <script src='https://www.google.com/recaptcha/api.js'></script>
  </body>
 </html>
diff --git a/recaptchalib.php b/recaptchalib.php
 <?php

 # PHPreCAPTCHA v0.1
 # GNU General Public License v3.0
 # This is a PHP library for Google's reCAPTCHA 2.0
 # Created by Martin Georgiev, geeorgiev[at]gmail.com
 # Web: www.viziongames.com

 /**
 * recaptchalib class
 */
 class recaptchalib
 {
    /**
     * @var string
     */
    protected $secret;

    /**
     * @var string
     */
    protected $response;

    /**
     * @var string
     */
    protected $URL;

    function __construct($secret, $response)
    {
        $this->secret = $secret;
        $this->response = $response;
        $this->URL = 'https://www.google.com/recaptcha/api/siteverify';
    }

    /**
     * Validating reCAPTCHA response
     * Response is collected from $_POST["g-recaptcha-response"]
     *
     * @param string $response
     * @return booleans
     */
    public function isValid()
    {
        $data = array(
            'secret' => $this->secret,
            'response' => $this->response
        );

        $options = array(
            'http' => array (
            'header' => "Content-Type: application/x-www-form-urlencoded\r\n",
            'method' => 'POST',
            'content' => http_build_query($data)
            )
        );

        $context  = stream_context_create($options);
        $verify = file_get_contents($this->URL, false, $context);

        return $this->fromJson($verify);
    }

    /**
     * Return response from the expected JSON returned by the service.
     *
     * @param string $json
     * @return string
     */
    public function fromJson($json)
    {
        $responseData = json_decode($json, true);
        if (!$responseData) {
            return false;
        }
        $hostname = isset($responseData['hostname']) ? $responseData['hostname'] : null;

        if (isset($responseData['success']) && $responseData['success'] == true) {
            return $responseData['success'];
        }
        if (isset($responseData['error-codes']) && is_array($responseData['error-codes'])) {
            return false;
        }
        return false;
    }
 }
	<?php
	if(isset($_POST["firstname"])){
	echo "<pre>";
	echo print_r($_POST, true);
	echo "</pre>";

	require("recaptchalib.php");
	/**
	* user your own private key here!!!
	* @var string
	*/
	$privatekey = "---YOUR-PRIVATE-KEY-HERE---";

	$response = $_POST["g-recaptcha-response"];
	$verify = new recaptchalib($privatekey, $response);

	if ($verify->isValid() == false) {
	die('you are a robot, nothing to do here...');
	} else {
	// Your code here to handle a successful verification
	die('you are not a robot, sending message...');
	}
	}
	?>
	<html>
	<head>
	<title>recaptcha tester</title>
	<style>
	/* Style inputs with type="text", select elements and textareas */
	input[type=text], select, textarea {
	width: 100%; /* Full width */
	padding: 12px; /* Some padding */
	border: 1px solid #ccc; /* Gray border */
	border-radius: 4px; /* Rounded borders */
	box-sizing: border-box; /* Make sure that padding and width stays in place */
	margin-top: 6px; /* Add a top margin */
	margin-bottom: 16px; /* Bottom margin */
	resize: vertical /* Allow the user to vertically resize the textarea (not horizontally) */
	}

	/* Style the submit button with a specific background color etc */
	input[type=submit] {
	background-color: #4CAF50;
	color: white;
	padding: 12px 20px;
	border: none;
	border-radius: 4px;
	cursor: pointer;
	}

	/* When moving the mouse over the submit button, add a darker green color */
	input[type=submit]:hover {
	background-color: #45a049;
	}

	/* Add a background color and some padding around the form */
	.container {
	border-radius: 5px;
	background-color: #f2f2f2;
	padding: 20px;
	}
	</style>
	</head>
	<body>
	<div class="container">
	<form action="index.php" method="post">

	<label for="fname">First Name</label>
	<input type="text" id="fname" name="firstname" placeholder="Your name..">

	<label for="lname">Last Name</label>
	<input type="text" id="lname" name="lastname" placeholder="Your last name..">

	<label for="country">Country</label>
	<select id="country" name="country">
	<option value="australia">Australia</option>
	<option value="canada">Canada</option>
	<option value="usa">USA</option>
	</select>

	<label for="subject">Subject</label>
	<textarea id="subject" name="subject" placeholder="Write something.." style="height:200px"></textarea>

	<!-- use your own site key here!!! -->
	<div class="g-recaptcha" data-sitekey="---YOUR-PUBLIC-KEY-HERE---"></div>

	<input type="submit" value="Submit">

	</form>
	</div>
	<script src='https://www.google.com/recaptcha/api.js'></script>
	</body>
	</html>
	<?php

	# PHPreCAPTCHA v0.1
	# GNU General Public License v3.0
	# This is a PHP library for Google's reCAPTCHA 2.0
	# Created by Martin Georgiev, geeorgiev[at]gmail.com
	# Web: www.viziongames.com

	/**
	* recaptchalib class
	*/
	class recaptchalib
	{
	/**
	* @var string
	*/
	protected $secret;

	/**
	* @var string
	*/
	protected $response;

	/**
	* @var string
	*/
	protected $URL;

	function __construct($secret, $response)
	{
	$this->secret = $secret;
	$this->response = $response;
	$this->URL = 'https://www.google.com/recaptcha/api/siteverify';
	}

	/**
	* Validating reCAPTCHA response
	* Response is collected from $_POST["g-recaptcha-response"]
	*
	* @param string $response
	* @return booleans
	*/
	public function isValid()
	{
	$data = array(
	'secret' => $this->secret,
	'response' => $this->response
	);

	$options = array(
	'http' => array (
	'header' => "Content-Type: application/x-www-form-urlencoded\r\n",
	'method' => 'POST',
	'content' => http_build_query($data)
	)
	);

	$context = stream_context_create($options);
	$verify = file_get_contents($this->URL, false, $context);

	return $this->fromJson($verify);
	}

	/**
	* Return response from the expected JSON returned by the service.
	*
	* @param string $json
	* @return string
	*/
	public function fromJson($json)
	{
	$responseData = json_decode($json, true);
	if (!$responseData) {
	return false;
	}
	$hostname = isset($responseData['hostname']) ? $responseData['hostname'] : null;

	if (isset($responseData['success']) && $responseData['success'] == true) {
	return $responseData['success'];
	}
	if (isset($responseData['error-codes']) && is_array($responseData['error-codes'])) {
	return false;
	}
	return false;
	}
	}