I haven’t seen it so far implemented in WordPress, anybody else? OK, here’s a little piece of code which will allow you to set the Match percentage on search result page of your WordPress theme. I guess it’s not hard to represent it graphically if one prefers, however I’ll stay focused on information only.
Yeah I know, many will say this info is not relevant or accurate enough but I found it quite useful when searching for specific phrase or string in the woods of search results.
<?php
// 'search.php'...get the search string $_GET[ 's' ], compare with content
similar_text( $_GET[ 's' ], get_the_content(), $percentMatch );
// round up result
$percentMatch = round( $percentMatch * 100 );
// get rid of inflates
if( $percentMatch > 100 ) $percentMatch = 100;
// output result
echo 'Match: <strong>' . $percentMatch . '%</strong>';
?>
Note that you will have to use this code within the loop. Otherwise get_the_content() is quite useless. I’m not sure whether similar_text() may affect server’s performance and slow down your site a bit…I guess there are people knowing better than myself and willing to share their knowledge.