Wordpress Hooks to add coustom term Options

wp-coustom-term-options.php

<?php

/**
  *
  * Add only for parents coustom term Options
  * @author rene reimann
  * @home http://www.rene-reimann.de
  *  
  * @hook category_add_form_fields Hooks into the category edit page
  * @hook edit_tag_form_fields Hooks into the category frontpage
  *  
  * @function custom_term_options() add a custom formfield only to a parent
  *   
  */

add_action( 'category_add_form_fields', 'custom_term_options');
add_action( 'edit_tag_form_fields', 'custom_term_options' ); // Hook in the category page

function custom_term_options(){  
  $label = 'My new Option';
  $description = 'Here is a Description';

  if(get_category($_GET['tag_ID'])->parent == 0){
    if(isset($_GET['action'])){
      $form = catSortOptionLoop(get_option("categorySort_".$_GET['tag_ID']));
    	$html = '<tr class="form-field"><th scope="row" valign="top"><label for="slug">'.$label.'</label></th><td>'.$form.'<p class="description">'.$description.'</p></td></tr>';
    }else{
      $html = '<div class="form-field form-required"><label for="tag-name">'.$label.'</label>'.catSortOptionLoop().'<p>'.$description.'</p></div>';
    }
    echo $html;
  }else{
    return false;
  }
}

/**
  *
  * Saving coustom term Options
  * @author rene reimann
  * @home http://www.rene-reimann.de
  *  
  * @hook edited_category Hooks before saving into the category edit page 
  * @hook create_category Hook before saving the new category
  *  
  * @function customTermOptionsSaveCategory() add a custom formfield
  *   
  */
 
add_action( 'edited_category', 'customTermOptionsSaveCategory' );
add_action( 'create_category', 'customTermOptionsSaveCategory' );

function customTermOptionsSaveCategory($catId){
  if($_POST['positon'] == 0){
    update_option("categorySort_$catId", $_POST['positon'] );
  }
}

/**
 * Create the option slectform
 * @author rene reimann
 *  
 * @param $aktOp int the activ option
 * @param $countOp int number of loops for selections
 * @return html selectform  
 *   
 */
 
function catSortOptionLoop($aktOp = false, $countOp = 5){
  $form = '<select class="postform" id="positon" name="positon" style="width:100px;"><option value="-1">Keine</option>';
  for($i = 1;$i <= $countOp;$i++){
    if($aktOp == $i){
      $form .= '<option value="'.$i.'" selected="selected">'.$i.'</option>';
    }else{
      $form .= '<option value="'.$i.'">'.$i.'</option>';
    }
  } 
  $form .= '</select>';
  return $form;
}

?>