Replace search keywords (whole words)
In case you need to replace certain whole words that the user enters to others (like synonyms), then use this custom code.
add_filter( 'asp_query_args', 'asp_replace_search_keywords', 10, 2 );
function asp_replace_search_keywords( $args, $id ) {
/**
* Add as many words as you want. On the left side place the
* word or words separated by comma to replace.
* To the right side, place the single word to replace it with.
*/
$replace = array(
'word1' => 'word2', // Replace 'word1' with 'word2'
'word3, word4' => 'word5' // Replace 'word3' and 'word4' with 'word5'
);
// ----------------------------------------
// Do not change anything below this line
// ----------------------------------------
foreach ( $replace as $k => $w ) {
$kr = explode(',', $k);
foreach ($kr as $krk => &$krv) {
$krv = trim($krv);
if ( $krv == '' ) {
unset($kr[$krk]);
} else {
$krv = '/\b' . $krv . '\b/u';
}
}
if ( count($krv) > 0 ) {
$args['s'] = preg_replace($kr, $w, $args['s']);
}
}
return $args;
}
Follow the instructions within the code to add/remove lines to the $replace array variable. Each key is a keyword or keywords separated by comma, and each value is the substitue keyword.