هل يوجد طريقة لاضافة اسكربت اتصل بنا PHP داخل صفحة HTML

<html>
<head>
<title>Mail sender</title></head><body>
<form action="mail.php" method="POST">
<b>Email</b><br>
<input type="text" name="email"size=40>
<p> <b>Subject</b> <br>
<input type="text" name="subject"size=40>
<p>
<b>Message</b><br>
<textarea cols=40 rows=10 name="message">
</textarea> <p>
<input type="submit" value=" Send ">
</form>
</body>
</html>

<html>
<head><title>PHP Mail Sender</title></head>
<body>
<?php

/* All form fields are automatically passed to the PHP script through the array $_POST. */
$email = $_POST['email'];
$subject = $_POST['subject'];
$message = $_POST['message'];

/* PHP form validation: the script checks that the Email field contains a valid email address and the Subject field isn't empty. preg_match performs a regular expression match. It's a very powerful PHP function to validate form fields and other strings - see PHP manual for details. */
if (!preg_match("/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/", $email)) {
echo "<h4>Invalid email address</h4>";
echo "<a href='javascript:history.back(1);'>Back</a>";
} elseif ($subject == "") {
echo "<h4>No subject</h4>";
echo "<a href='javascript:history.back(1);'>Back</a>";
}

/* Sends the mail and outputs the "Thank you" string if the mail is successfully sent, or the error string otherwise. */
elseif (mail($email,$subject,$message)) {
echo "<h4>Thank you for sending email</h4>";
} else {
echo "<h4>Can't send email to $email</h4>";
}
?>
</body>
</html>