javascript inside php

1<?php
2  FONCTION_PHP(){
3  ?>
4   <script>
5    function fonctionJavaScript(){
6  }
7    </script>
8<?php
9	}
10  ?>

1//this is my code 
2
3you can add javascript to your code by using the echo statement and rap all 
4your javascript between "" and if there is "" in the javascript code
5then add \ before any "", and for the php inside rap it with ''
6  
7  
8<?php
9  echo "<script>document.write(\"hello world\")</script>"
10?>
11  
12//other example
13
14<?php
15  $a = 5;
16  echo "<script>document.write('$a')</script>"
17?>
18
19//other example
20  
21<?php 
22$TokenData = Auth::user();
23
24echo "<script type=\"text/javascript\">
25             localStorage.setItem(\"id\", '$TokenData->id');
26             localStorage.setItem(\"name\", '$TokenData->name');
27             localStorage.setItem(\"email\", '$TokenData->email');
28      </script> ";
29