How do I know what version of WordPress I have?

Use php.ini or phpinfo.php file to view the PHP version. Check your cPanel under the statistics sidebar or use apps like “PHP Config”, “PHP Variable Manager” or similar. Remember each folder on your account can have different PHP versions. Hence look for the folder on which you have WordPress installation.
For More Information Please Refer:
https://www.webnots.com/how-to-update-php-version-in-wordpress/
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