Replace search keywords (whole words)

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

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Replace or remove characters from search phrase

Last modified 1yr ago

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