Started writing the Super Globals (#32995)

I started creating the super globals file. I have mentioned $_GET and $_POST I will continue with the others

guide/english/php/super-globals/index.md

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 title: Super Globals
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 ## Super Globals
 
 This is a stub. <a href='https://github.com/freecodecamp/guides/tree/master/src/pages/php/super-globals/index.md' target='_blank' rel='nofollow'>Help our community expand it</a>.
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+## List of Super Globals and what are they
+Super globals are variables defined in the core of PHP, and they are available in all scopes throughout the script. This means that you do not need to define them as **global $variable** .
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+These superglobal variables are:
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+$GLOBALS
+$_SERVER
+$_GET
+$_POST
+$_FILES
+$_COOKIE
+$_SESSION
+$_REQUEST
+$_ENV
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+They all have their use cases, but mostly to beginners _$_GET_ and _$_POST_ are the most used. **$_GET**_ Pulls data from the url, while **$_POST**_ pulls data from the post request. Both of these are arrays. **$_REQUEST**_ is a collection of GET and POST. 
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 #### More Information:
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