Added global documentation

[keyurptl]

Added Global documentation according to PHP Documentation Standards.

Fixes: #1003

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[mukeshpanchal27]

Thanks, @keyurptl, for the PR. We don't need this global variable as it will not be used on the page. Instead of adding the document, we should remove it from the code.

Please correct me if I missed anything. Thank you!

[keyurptl]

Thanks, @keyurptl, for the PR. We don't need this global variable as it will not be used on the page. Instead of adding the document, we should remove it from the code.

Please correct me if I missed anything. Thank you!

@mukeshpanchal27 Thanks for the feedback.

I have updated changes as per mentioned.

[felixarntz]

Thank you @keyurptl!

[mukeshpanchal27]

Thanks @keyurptl for the updates. LGTM!