apply_filters( ‘preprocess_comment’, array $commentdata )

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   Steven Lin 5 years ago

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   Example migrated from Codex:

   The example below remove the URL from the comment author text (comment_author_url) and changes the first character of each word of the comment content to upper case if it’s in all upper case.

   add_filter( 'preprocess_comment' , 'preprocess_comment_remove_url' );
   
   <?php
   function preprocess_comment_remove_url( $commentdata ) {
      // Always remove the URL from the comment author's comment
      unset( $commentdata['comment_author_url'] );
   
      // If the user is speaking in all caps, lowercase the comment
      if( $commentdata['comment_content'] == strtoupper( $commentdata['comment_content'] ) ) {
         $commentdata['comment_content'] = ucwords( strtolower( $commentdata['comment_content'] ) );
      }
   
      return $commentdata;
   }
   ?>