I'm learning PHP and working on some basic functions. I was wondering why my send message function doesn't work.
I have 2 PHP files:
- One to process the login and
- One to process the message.
Any advice?

index.php
<form name="admin" method="POST" action="process.php">
    <div>
        <label for="login">Login: </label>
        <input type="text" name="login" placeholder="Login"/>
    </div>
    <div>
        <label for="password">Password: </label>
        <input type="text" name="password" placeholder="Password"/>
    </div>
    <div>
        <input type="submit" name="submit" value="Submit">
    </div>
</form>
<br>
<form name="sendmail" method="POST" action="sendmail.php">
    <div>
        <p><b>Send me a message:</b></p>
        <textarea name="message"></textarea>
    </div>
    <div><input type="submit" name="submit" value="Send"></div>
    </div>
    
    
</form>
sendmail.php
<?php
$message = '';
foreach($_POST as $name=>$value){
    if('submit'!=$name){
        if(is_array($value)){
            /*  SYNTAX: implode(separator,array) - 
                converts an array of values as a string. */
            $value=implode(', ', $value);
        }
        $message .= ucfirst($name) ."is $value.\n\n";
    }
}
$to      = 'testemail@test.org';
$subject = 'Form submission from webapp';
if (mail($to, $subject, $message)){
    echo "Your message has been sent.";
 };
?>
 
     
    