In case that you can’t use the PHP Version Manager in cPanel, you can change your PHP version by adding a line of code to your .htaccess file of your wordpress website.

To apply these changes you can use a FPT software like FileZilla (this is what i usually use). Locate your .httaccess file and at the top of the document add the following line of code:

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AddType application/x-httpd-php71 .php

Or this line of code if the first one doesn’t work for you

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Action application/x-httpd-php71 /cgi-sys/php71-fcgi-starter.fcgi

Here is an example

That’s all there is to it.