How to make functions and filters dynamic for all the custom fields

Hi,

This plugin works grate!!

We want to know how can we make functions and filters dynamic for all the custom fields.

We added this code for a single custom field revision.

//State that wp-post-meta-revisions should save our field
function add_meta_keys_to_revision( $keys ) {
$keys[] = ‘test’;
return $keys;
}
add_filter( ‘wp_post_revision_meta_keys’, ‘add_meta_keys_to_revision’ );

//Define the field on the revisions screen
function extrev_custom_fields($fields)
{
$fields[‘test’] = ‘Revision meta value’;
return $fields;
}
add_filter(‘_wp_post_revision_fields’,’extrev_custom_fields’);

//For some reason (havent looked into it) the value is in a array, just pick it out
function extrev_field( $value, $field ) {

$test = $value[0];
return $test;
}
add_filter( ‘_wp_post_revision_field_test’, ‘extrev_field’, 10, 2 );

Please let us know if we can do something to make it dynamic for all other fields.

Thanks!
Shweta