Javascript + PHP：在echo期间删除额外的字段

Question

In the code below:

<SCRIPT> 
  var randomJS = Math.floor(Math.random()*11) 

  <?php
     $randomPHP = "<script>document.write(random)</script>"; 
  ?>

</SCRIPT>

<?php
     echo $randomPHP; 
?> 

The php code will echo a random value in the webpage. This is all fine. But if I email it will echo the following:

<script>document.write(random)</script>

I don't want that. I just need a single numeric value.

Please let me know how to get this done?

Thank You.

UPDATE: Instead of email, lets assume I am trying to attach the random number in the link.

<form  class="form-inline" action="index.php#<?php echo $randomPHP ?>" method = "post" >

// Form code

</form>

This will output: I dont want that...

www.url/index.php#<script>document.write(random)</script>

I need this...

www.url/index.php#{-some-random-value-}

Answer 1

<SCRIPT> 
  var randomJS = Math.floor(Math.random()*11) 

</SCRIPT>

and use <script> document.write(randomJS);</script> where you want to output the variable. The PHP you're using isn't helping anything, even if it does work.