php - Google's reCaptcha to reduce spam -


i noticed huge increase in spam emails coming website's contact form , looking using google's recaptcha method reduce and/or eliminate spam.

my website has contact form along .php file form. here snippet of html code contact form:

<form class='mailform' method="post" action="bat/rd-mailform.php">             <input type="hidden" name="form-type" value="contact"/>              <fieldset>               <label data-add-placeholder="">                <input type="text"                 name="name"                 placeholder="name"                 data-constraints="@lettersonly @notempty"/>              </label>.............

i have registered google recaptcha obtain site key , secret key , have added <div> within <form></form> section. here snippet of code:

<div class="g-recaptcha" data-sitekey="mykey"></div>

i have added following head section:

<script src='https://www.google.com/recaptcha/api.js'></script>

since site has .php file contact form, how modify file recaptcha works properly?

here snippet of rd-mailform.php file running website:

<?php   $recipients = 'email@gmail.com, email@verizon.net';  try { require './phpmailer/phpmailerautoload.php';  preg_match_all("/([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)/", $recipients, $addresses, preg_offset_capture);  if (!count($addresses[0])) {     die('mf001'); }  if (preg_match('/^(127\.|192\.168\.)/', $_server['remote_addr'])) {     die('mf002'); }  $template = file_get_contents('rd-mailform.tpl');  if (isset($_post['form-type'])) {  ....................

do need modify above .php file? online searching, looks may have include recaptchalib.php library file , upload hosting server.

no don't need library recaptcha sending information when handle form submission.

<?php $secretkey = "your secret key when register recaptcha";  if(!empty($_post['g-recaptcha-response'])){     $response = json_decode(file_get_contents("https://www.google.com/recaptcha/api/siteverify?secret=". $secretkey. "&response=" . $_post['g-recaptcha-response']));      if (!$response->success) {         // there problem implement logic!     } }

updated : // standard.html

<div id="recaptcha" class="g-recaptcha" data-lang="tr"></div> <script src="https://www.google.com/recaptcha/api.js?onload=onloadcallback&render=explicit" async defer></script> <script>     grecaptcha.render('recaptcha', {       'sitekey' : 'yoursitekey',       'theme' : 'light'     }); </script>

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