Modify wp_trim_words function to return content split in 2

3 comments

1. It seems to me that you simply copied the trim_words() function of WordPress. You could have done better. Your desired output is unclear.

   Supposing that you would be happy with the simple tag-less string of left-over words returned together with the output of the original function, you could use something like this (untested):

   function wp_trim_words_2( $text, $num_words = 55, $more = null ) {
       if ( null === $more )
           $more = __( '…' );
       $original_text = $text;
       $text = wp_strip_all_tags( $text );
       /* translators: If your word count is based on single characters (East Asian characters),
          enter 'characters'. Otherwise, enter 'words'. Do not translate into your own language. */
       if ( 'characters' == _x( 'words', 'word count: words or characters?' ) && preg_match( '/^utf-?8$/i', get_option( 'blog_charset' ) ) ) {
           $text = trim( preg_replace( "/[nrt ]+/", ' ', $text ), ' ' );
           preg_match_all( '/X/u', $text, $match_array );
           $split_array = $match_array[0];
           $sep = '';
       } else {
           $split_array = preg_split( "/[nrt ]+/", $text, -1, PREG_SPLIT_NO_EMPTY );
           $sep = ' ';
       }
       $words_array = array_slice( $split_array, 0, $num_words + 1 );
       if ( count( $words_array ) > $num_words ) {
           array_pop( $words_array );
           $text = implode( $sep, $words_array );
           $text = $text . $more;
           $rest = implode( $sep, array_slice( $split_array, $num_words ) );
       } else {
           $text = implode( $sep, $words_array );
           $rest = '';
       }
       /**
        * Filter the text content after words have been trimmed.
        *
        * @since 3.3.0
        *
        * @param string $text          The trimmed text.
        * @param int    $num_words     The number of words to trim the text to. Default 5.
        * @param string $more          An optional string to append to the end of the trimmed text, e.g. ….
        * @param string $original_text The text before it was trimmed.
        */
       return array( apply_filters( 'wp_trim_words_2', $text, $num_words, $more, $original_text ), $rest );
   }
   

   to be called like this:

   list($trimmed, $rest) = wp_trim_words_2($text);
   

   I’m not sure about apply_filters(), though. Should it be passed the $rest too? It’s too time-consuming for me to study this one, sorry.

   If, on the other hand, you wanted the $rest before tag removal (i.e., before the call to wp_strip_all_tags()), then things are much more complicated, because the original functions splits the input into words after that, and I can think only of inefficient ways to keep the correspondence between the input and the output of wp_strip_all_tags().

   BTW, the original code by WordPress contains a bug: words for East Asian languages are wrongly counted (and potentially split!) as single Unicode characters instead of Unicode graphemes. The fix is to use '/X/u' instead of '/./u' (read here for an explanation).

   Log in to Reply

2. Not sure you need to tweak that function at all, this code does what you ask:

   $trimmed_text = wp_trim_words($text, $wordlength, '');
   
   // Measure full and trimmed widths for comparison
   $fw = mb_strwidth($text);
   $tw = mb_strwidth($trimmed_text);
   
   if( $fw != $tw ){
       $clipped_text = mb_strimwidth($text, $tw, $fw - $tw, '');
       // Text has been cut
   } else {
       // Text has NOT been cut
   }
   

   or wrap it in a function behaving as you wanted initially

   function wp_trim_words_new($text, $length, $delimiter=''){
       $trimmed_text = wp_trim_words($text, $length, $delimiter);
       $fw = mb_strwidth($text);
       $tw = mb_strwidth($trimmed_text);
       if( $fw != $tw ){
           return [$trimmed_text, mb_strimwidth($text, $tw, $fw - $tw, $delimiter)];
       } else {
           return [$text, null];
       }
   }
   

   Log in to Reply

3. You can accomplish this without the wp_trim_words function.

   $sentence = "This is a sample sentence";
       $words = explode(" ", $sentence);
       $half = count($words) / 2;
       $first_half = implode(" ", array_slice($words, 0, $half));
       $second_half = implode(" ", array_slice($words, $half));
       
       echo $first_half . "n";
       echo $second_half;
   

   Log in to Reply