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reCAPTCHA

Installation

With Composer, add this line to your require section :

"phelium/recaptcha": "dev-master"

Then run composer update.

Initilization

require 'vendor/autoload.php';

use Phelium\Component\reCAPTCHA;

To initialize reCAPTCHA, you must provide your site key and your secret key.
There is two possible ways :

$reCAPTCHA = new reCAPTCHA('your site key', 'your secret key');

or

$reCAPTCHA = new reCAPTCHA();
$reCAPTCHA->setSiteKey('your site key');
$reCAPTCHA->setSecretKey('your secret key');

Usage

To generate the script tag, use :

$reCAPTCHA->getScript();

To generate the HTML block, use in your form :

$reCAPTCHA->getHtml();

Checking the server side, in your form validation script :

if ($reCAPTCHA->isValid($_POST['g-recaptcha-response']))
{
	// do whatever you want, the captcha is valid
}
else
{
	// Show errors
	var_dump($reCAPTCHA->getErrorCodes());
}

Customization

Theme

Several themes are available : light (default) or dark.

$reCAPTCHA->setTheme('dark');

Language

You can change the language of reCAPTCHA. Check https://developers.google.com/recaptcha/docs/language for more information.
By default, the language is automatically detected.

$reCAPTCHA->setLanguage('it');

Type

Several types are available : image (default) or audio.

$reCAPTCHA->setType('audio');

Size

Two sizes are available : normal (default) or compact.

$reCAPTCHA->setType('compact');

Full example

Here is an example :

<?php
require 'vendor/autoload.php';
use Phelium\Component\reCAPTCHA;

$reCAPTCHA = new reCAPTCHA('your site key', 'your secret key');
?>

<html>
<head>
    <title>reCAPTCHA example</title>
    <?php echo $reCAPTCHA->getScript(); ?>
</head>

<body>

<?php
if (isset($_POST['name']))
{
    var_dump($_POST);

    if ($reCAPTCHA->isValid($_POST['g-recaptcha-response']))
    {
        echo '<br>-- Captcha OK ! --<br>';
    }
}
?>

<form action="#" method="POST">
    <input type="text" name="name" placeholder="name">

    <?php echo $reCAPTCHA->getHtml(); ?>

    <input type="submit">
</form>

</body>
</html>