/PHP/How to store javascript into a php variable

How to store javascript into a php variable

//this is my code 

$value = <<<data
       <!--instead of writing data we can name it anything 
       as long as we close it with the same name, 
       and that name must not be a keyword in javascript -->

        <script>
         document.write("hello world");
        </script>
       data;

so the php variable $value will not store the string "hello world" inside it,
so the php variable is just a temporary container for the javascript code and nothing else,
and if we echo the vairable like this:-
  
echo $value;
then hello world will be printed in the browser page,
and it is the same as using echo to excute a javascript code, so it is as:-
  
echo "<script>document.write(\"hello world\")</script>"
  
  
  
//using console instead of document.write
  
$value = <<<inConsole
        <script>
         console.log("hello world");
        </script>
       inConsole;


but the value will not be printed in the console unless we echo the variable, 
like this:-

echo $value
then hello world will be printed in the console
  
  
  
//other examples such as storing data to localstorage
  
$local = <<<localstorage
        <script>
         localStorage.setItem("anything", "hello");
        </script>
        localstorage;


but this code will not work until we echo the variable such as:-
echo $local

and if we open the console and write localstorage then the item anything
with its value hello will appear
  
  
  
  
  
  
and if we want to remove the item from localstorage then use this code:-

$local = <<<localstorage
        <script>
         localStorage.removeItem("anything");
        </script>
        localstorage;

        echo $local;

note: never forget to use the echo statement or the code will not work
  
  
  
  
and if we want to get data from localstorage, we use this code

$local = <<<localstorage
        <script>
         let a = localStorage.getItem("anything");
         document.write(a);
        </script>
        localstorage;

        echo $local;

then the value of the varaible a will be print in the webpage,

Source: stackoverflow.com

Similar codes

8 votes185 views3 answers
Eloquent using last()
PHP
0 vote236 views1 answer
Get upload error codeigniter
PHP CodeIgniter
0 vote180 views1 answer
PHP Warning: PHP Startup: Unable to load dynamic library 'apc.so'
PHP
0 vote202 views1 answer
Disable laravel passport
PHP
1 vote191 views1 answer
Empty func php
PHP
9 votes249 views3 answers
Laravel join 2 tables eloquent
PHP Laravel
1 vote195 views1 answer
Php file get content replacing & with &
PHP
0 vote216 views1 answer
How to get the root domain in laravel
PHP
7 votes206 views1 answer
Laravel not in query
PHP Laravel
1 vote179 views1 answer
Custom column for latest() laravel
PHP Laravel