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Found 3 results

  1. My first question: I have a message like this: notice: undefined offset 0 I use an input form to check with dns_get_record and DNS_MX whether the domain of an email exists. I can check the emails if the domain does exist, but a wrong domain like: mail@verynonexistingdomain.com throws in the notice undefined offset 0 so does an empty input. <html> <center> <br> email input :<br> <form action="#" method = "post"> <input type ="text" name ="mail"> <br> <input type="submit" name = "click" value ="zend"> </form> <?php $domain =''; $data =''; var_dump($_POST['click']); var_dump($_POST['mail']); if (isset($_POST['mail'])) { echo $_POST['mail']; $input = $_POST['mail']; } // // function check_address($input){ list($user, $domain) = explode('@', $input); $data= dns_get_record($domain, DNS_MX); if($data[0]['host']==$domain&&!empty($data[0]['target'])) { return $data[0]['target']; } else { }} echo check_address($input); Echo '<br><br>'; echo $input . " : " ; if(check_address($input) ) { echo('<br>This MX records exists; I will accept this email as valid.<br> '); } else { echo('<br>No MX record exists; Invalid email.<br>'); } echo '</center>'; ?> </html> I had it working without the form part so with a constant variable, but when I added the form it threw the error. I tried several options, but cant find the logic behind executing a good input without throwing an error and a bad domain giving this notice. Anyone any idea?
  2. <html><center><br><br><br>checks with get headers <form action="#" method="post"> <input type="text" name="webadres" value=" " required> <br> <input type="submit" value="Send" ><br><br><br> </form> <?php if ($_SERVER['REQUEST_METHOD'] == 'POST'){ $sites= $_POST['webadres']; var_dump($sites); if (isset($sites)) { var_dump(get_headers($sites)); } ?> <br><br>Checks with curl get info <?php $url = curl_init($sites); curl_setopt($url, CURLOPT_RETURNTRANSFER, 1); $result = curl_exec($url); $info = curl_getinfo($url); print_r($info); curl_close($url); } ?> </html> I made above script to test whether a webadress exists or not. I'm very surprised that a lot of inputs dont give any result, they actually give a php error message. using sites like http://www.facebook.com does not work, for it twitter it runs. pinterest does only run http and not https. I also found sites like http://www.bbc.co.uk or http://www.cnn.com and more giving no result. Can someone explain why this happens and how to securily check the existance of a website.
  3. Hi, I'm trying to let JavaScript check if a givin user exist in the database. It seems that the _check-user.php always returns 0, but if I fill in a name that doesn't exist, and echo out the result variable in JS, the echo will return 1. Is there someone who could help me? JavaScript part: function checkUser() { $.post("_check_user.php", { 'username': document.getElementById("username").value }, function(result) { if (result == 1) { document.getElementById("checkUser").className = "succes"; document.getElementById("checkUser").innerHTML = "Name is available"; }else{ document.getElementById("checkUser").className = "errormsg"; document.getElementById("checkUser").innerHTML = "Name is not available!"; } });} _check-user.php: <?phpinclude("config.php");$result = mysql_query("SELECT login FROM users WHERE login='".clean_string($_POST["username"])."'");if(mysql_num_rows($result)>0){ echo 0;}else{ echo 1;}?>
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