Answered retreive $_POST within snippet what is the best way to loop?

<?php
$valid = array();
$modx = new modX();
$arr = $modx->sanitize($_POST);
array_pop($arr);
$newarray = array();
$newarray[] = '<Leads><row no="1"><FL val="Lead Source">Web</FL>';
foreach ($arr as $k=>$v) {
    if($k == 'Email') {
        // checks email 
        $email = $v;
        $regex = "^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$^"; 
        if (preg_match($regex, $email)) 
                { 
                    $valid['Email'] = true;
                    
                } else  { 
                    $valid['Email'] = false; 
                    
                } 
    }
    
    if($k == 'LEADCF13') {
        // checks message
        if(preg_match('/^[a-zA-Z0-9 .\-]+$/i', $v)) {
            $valid['message'] = true; 
        } else {
            $valid['message'] = false;
        }
    }
    
    if($k == 'Phone') {
        $phone = $v;
        $input = str_replace(' ', '', $phone);
        
        if($input && strlen($input) > 9) {
        $pattern = "^\(?(?:(?:0(?:0|11)\)?[\s-]?\(?|\+)44\)?[\s-]?\(?(?:0\)?[\s-]?\(?)?|0)(?:\d{5}\)?[\s-]?\d{4,5}|\d{4}\)?[\s-]?(?:\d{5}|\d{3}[\s-]?\d{3})|\d{3}\)?[\s-]?\d{3}[\s-]?\d{3,4}|\d{2}\)?[\s-]?\d{4}[\s-]?\d{4}|8(?:00[\s-]?11[\s-]?11|45[\s-]?46[\s-]?4\d))(?:(?:[\s-]?(?:x|ext\.?\s?|\#)\d+)?)$^";
        
        $match = preg_match($pattern,$input);
        
            if ($match != false) {
                // We have a valid phone number
                $v = $input;
                $valid['Phone'] = true;
            } else {
                // We have an invalid phone number
                $valid['Phone'] = false;
            }
        
        } else {
            $valid['Phone'] = false;
        }
        
    }
    
    
    if($k == 'fullname') {
        $names = explode(' ', $v);
        if(isset($names[0])) {
        $newarray[] = "<FL val='First Name'>{$names[0]}</FL>";
        }
        if(isset($names[1])) {
        $newarray[] = "<FL val='Last Name'>{$names[1]}</FL>";
        }
    continue;
    }
    $newarray[] = "<FL val='$k'>$v</FL>";
}
$newarray[] = '</row></Leads>'; 
$data = str_replace(',','',implode(',', $newarray));

if(!in_array(false, $valid)) {
try {
 //Initialize connection 
  $ch = curl_init('https://crm.zoho.com/crm/private/xml/Leads/insertRecords?');
  curl_setopt($ch, CURLOPT_VERBOSE, 1);//standard i/o streams 
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);// Turn off the server and peer verification 
  curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); 
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);//Set to return data to string ($response) 
  curl_setopt($ch, CURLOPT_POST, 1);//Regular post 
  //Set post fields 
  //this script is being proccessed by a form so I also put all of my $_POST['name'] variable here to be 
  //used in the $xmlData variable below

  $authtoken = "THIS_IS_MY_TOKEN_RECEIVED_FROM_THIRD_PARTY";

  $query = "newFormat=1&authtoken={$authtoken}&scope=crmapi&xmlData={$data}"; 
  curl_setopt($ch, CURLOPT_POSTFIELDS, $query);// Set the request as a POST FIELD for curl. 
  //Execute cUrl session 
  $result = curl_exec($ch);
      throw new Exception('zoho crm export : '.$result);
  
  curl_close($ch);
} catch(Exception $e) {
    $modx->log(xPDO::LOG_LEVEL_ERROR,$e);
}
}

return true;

error_reporting(E_ALL); 
ini_set("display_errors", 1);