將電子郵件添加到XML文件

我是php的新手。我想我的問題是strpos。我嘗試了一切，但沒有任何幫助。將電子郵件添加到XML文件

PHP文件：

function addMailToXML() { 

$new = $_POST['new-mail']; 
$mails = array(); 
$subject = ""; 
$body = ""; 
$data = loadConfig(); 

if(!check_email_address($_POST['new-mail'])){ 
echo 'Wrong address!!!'; 

} else { 
if(strpos($data['mails'], $new) !== false) { 
echo 'Already in database!!!'; 

} else { 
$data['mails'][] = trim($new); 
saveConfig($data['mails'], $data['subject'], $data['body']); 
echo 'Successfully registered.'; 
} 
} 
}

XML文件：

<?xml version="1.0" encoding="UTF-8"?> 
<item><mails>[email protected],[email protected],[email protected]</mails><subject></subject><body></body></item>

來源

2012-01-17 Roman Pavlis