Reply To: Add/extend custom field settings

• jmarceli

• October 17, 2017 at 9:30 am

I see there is no way of customizing existing fields settings, so I made up my own solution which is based on the instructions content. Here is the code (in case anyone is interested), what it does is limiting a maximum number of words in WYSIWYG field:

// Check  if number of words in WYSIWYG is less than max number
// provided inside field instructions. Supported instructions format is (see the regex):
// Max. 300 words
// max 300 words
// max.300 words
add_filter('acf/validate_value/type=wysiwyg', function ( $valid, $value, $field, $input ){
	if( !$valid ) {
		return $valid;
	}
	
  $matches = [];
  preg_match('/max[^\d]*(\d+) word/i', $field['instructions'], $matches);

  if ( empty( $matches ) || empty( $matches[1] ) ) {
    return $valid;
  }

  $max_words = (int) $matches[1];

  // check words number
  $words_number = str_word_count( strip_tags( $value ) );
  if ( $words_number > $max_words ) {
    $valid = "Text is too long ( ${words_number} words ). Max number of words is ${max_words}.";
  }
	
	// return
	return $valid;
}, 10, 4);