How to change the name of the uploaded files?

If you want to change the name of the files you upload on your site, please proceed as indicated.

Go to cPanel/ FTP > File Manager > public_html > wp-content > themes > wpjobster-child > edit 'functions.php' an add below mentioned code > Save changes

add_filter( 'wpj_uploaded_file_name_filter', function( $filename= '' ) {
    $filename = 'MyCustomString';
    return $filename ;
}, 10, 1);

Note: change 'MyCustomString' with the word you wish. Please make sure you leave no space in between if there are multiple words.

After adding the code it will be displayed as follows on any page where you upload files: