PHP - Extract Email Address From Stripe Api

I have a function that is supposed to find the email address of the user that's logged in my application. going by their ID:

function getUserEmail($userID){
    $sqll="SELECT id,email FROM users WHERE id='".$userID."'";
    $result1=mysql_query($sqll);
    $row11=mysql_fetch_assoc($result1);
    $processor=$row11["email"]; 
    return $processor;
}

What I'm trying to do is incorporate that into sending a simple email to the person that's logged in after they submit a file. But the email is not being sent and I'm getting this message: Warning: mail() expects parameter 1 to be string, array given   Here is what I have for sending the email :

$sendto = getUserInfo($_REQUEST[1][email]);
$subject = "File recieved";
$message = "Hello " . getUser($_REQUEST["user"]) . ". you successfully submitted: $title";
mail($sendto, $subject, $message);

How do I extract just the email address to prevent giving the array?  

i wanting users to be able to update there email address and check to see if the new email already exists. if the email is the same as current email ignore the check.
i have no errors showing up but if I enter a email already in the db it still accepts the new email instead of bringing the back the error message.
Code: [Select]
// email enterd from form //
$email=$_POST['email'];


$queryuser=mysql_query("SELECT * FROM members WHERE inv='$ivn' ") or die (mysql_error());
 while($info = mysql_fetch_array( $queryuser )) {
  $check=$info['email'];
 // gets current email //
}


if($check!=$email){
// if check not equal to $email check the new email address already exists//
$queryuser=mysql_query("SELECT * FROM members WHERE email='$email' ");
//$result=mysql_query($sql);
$checkuser=mysql_num_rows($queryuser);
if($checkuser != 0)
{
$error= "0";
header('LOCATION:../pages/myprofile.php?id='.$error.'');


}
}

cheers

I have a form with PHP validation and also a mysqli query checking for duplicates in the database for mailing address and email address in mysql.     It works fine but the customers are adding spaces in the mailing address for example  111 mailing address A V  E, 1 1 1 ma iling address A V  E etc.  and my sql query doesn't see that as an address that's a duplicate.    Their alslo adding email address like my@emailaddress.com and m.y@emailaddress.com, m.y.2@emailaddress.com etc to bypass that comparision also.    Is there anyway to stop this from happening?        

Hello,
I am working with a SMTP class to send an email. It's all working perfectly fine, but when the email is received (sent from the online form), and I open my email and click reply, there are two email addresses. The correct one (which I entered when I sent the email), and my ftp username for the site??

I've got three files that could effect this, but I was unable to locate any problems:
mailer.php ( smtp send mail class)
mail.php ( submission data: title, subject, etc. )
contact_form.php ( form for submission )

I am only including the file which I think is applicable (mail.php), but let me know if you would also like to see the mailer.php class.

Current output:

reply-to   ftpusername@domainname.com,
correct_from_email@fromemail.com

mail.php:

<?php
  set_time_limit(120);
  
  function sendHTMLmail($from, $to, $subject, $message)
  {
      $message = wordwrap($message, 70);
      
      // To send HTML mail, the Content-type header must be set
      $headers = 'MIME-Version: 1.0' . "\r\n";
      $headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";
      
      // Additional headers
      $headers .= "From: $from\r\n";
      
      // Mail it
      mail($to, $subject, $message, $headers);
  }
  
  function sendHTMLmail2($fromid, $to, $subject, $message)
  {
      echo $fromid;
      echo $to;
      echo $subject;
      echo $message;
      include_once("mailer.php");
      $mail = new PHPMailer();
      $mail->IsMail();
      // SMTP servers
      $mail->Host = "localhost";
      $mail->From = $fromid;
      $mail->FromName = $fromid;
      $mail->IsHTML(true);
      $mail->AddAddress($to, $to);
      $mail->Subject = $subject;
      $mail->Body = $message;
      $mail->AltBody = "Please enable HTML to read this";
      $mail->Send();
      exit;
  }
  function isValidEmail($email)
  {
      return eregi("^[_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3}$", $email);
  }
  
  
  class smtp_mail
  {
      var $host;
      var $port = 25;
      var $user;
      var $pass;
      var $debug = false;
      var $conn;
      var $result_str;
      var $charset = "utf-8";
      var $in;
      var $from_r;
      //mail format 0=normal 1=html
      var $mailformat = 0;
      function smtp_mail($host, $port, $user, $pass, $debug = false)
      {
          $this->host = $host;
          $this->port = $port;
          $this->user = base64_encode($user);
          $this->pass = base64_encode($pass);
          $this->debug = $debug;
          $this->socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
          if ($this->socket) {
              $this->result_str = "Create socket:" . socket_strerror(socket_last_error());
              $this->debug_show($this->result_str);
          } else {
              exit("Initialize Faild,Check your internet seting,please");
          }
          $this->conn = socket_connect($this->socket, $this->host, $this->port);
          if ($this->conn) {
              $this->result_str = "Create SOCKET Connect:" . socket_strerror(socket_last_error());
              $this->debug_show($this->result_str);
          } else {
              exit("Initialize Faild,Check your internet seting,please");
          }
          $this->result_str = "Server answer:<font color=#cc0000>" . socket_read($this->socket, 1024) . "</font>";
          $this->debug_show($this->result_str);
      }
      
      function debug_show($str)
      {
          if ($this->debug) {
              echo $str . "<p>\r\n";
          }
      }
      
      function send($from, $to, $subject, $body)
      {
          if ($from == "" || $to == "") {
              exit("type mail address please");
          }
          if ($subject == "")
              $sebject = "none title";
          if ($body == "")
              $body = "none content";
          
          $All = "From:$from;\r\n";
          $All .= "To:$to;\r\n";
          $All .= "Subject:$subject;\r\n";
          if ($this->mailformat == 1) {
              $All .= "Content-Type:text/html;\r\n";
          } else {
              $All .= "Content-Type:text/plain;\r\n";
          }
          $All .= "Charset:" . $this->charset . ";\r\n\r\n";
          $All .= " " . $body;
          
          $this->in = "EHLO HELO\r\n";
          $this->docommand();
          
          $this->in = "AUTH LOGIN\r\n";
          $this->docommand();
          
          $this->in = $this->user . "\r\n";
          $this->docommand();
          
          $this->in = $this->pass . "\r\n";
          $this->docommand();
          
          if (!eregi("235", $this->result_str)) {
              $this->result_str = "smtp auth faild";
              $this->debug_show($this->result_str);
              return 0;
          }
          
          $this->in = "MAIL FROM: $from\r\n";
          $this->docommand();
          
          $this->in = "RCPT TO: $to\r\n";
          $this->docommand();
          
          $this->in = "DATA\r\n";
          $this->docommand();
          
          $this->in = $All . "\r\n.\r\n";
          $this->docommand();
          
          
          if (!eregi("250", $this->result_str)) {
              $this->result_str = "Send mail faild!";
              $this->debug_show($this->result_str);
              return 0;
          }
          
          $this->in = "QUIT\r\n";
          $this->docommand();
          socket_close($this->socket);
          return 1;
      }
      
      function docommand()
      {
          socket_write($this->socket, $this->in, strlen($this->in));
          $this->debug_show("Client command:" . $this->in);
          $this->result_str = "server answer:<font color=#cc0000>" . socket_read($this->socket, 1024) . "</font>";
          $this->debug_show($this->result_str);
      }
  }
?>

Hi, n0obie here.  I'm trying to identify where my customers are coming from via emails I've sent/received. However, many email providers (namely Gmail) have circumvented this by disallowing IP address geolocation/image caching.