Drop down list grouped

Posted: 26 March 2007 07:43 PM

[ Ignore ]

Summer Student

Total Posts: 1

Joined 03-26-2007

I edited form_dropdown() function (system/helpers/form_helper.php) that can be useful.

<?php

/**
 * Drop-down Menu
 *
 * @access    public
 * @param    string
 * @param    array
 * @param    string
 * @param    string
 * @return    string
 */    
function form_dropdown($name = '', $options = array(), $selected = '', $extra = '')
{
    if ($extra != '') $extra = ' '.$extra;
        
    $form = '<select name="'.$name.'"'.$extra.">\n";
    foreach($options as $key => $val)
    {
        if(is_array($val)) 
        {
            $form .= '<optgroup label="'.$key.'">'."\n";
            foreach ($val as $key2 => $val2)
            {
                $sel = ($selected != $key2) ? '' : ' selected="selected"';
                
                $form .= '<option value="'.$key2.'"'.$sel.'>'.$val2."</option>\n";
            }
            $form .= "</optgroup>\n";
        }
        else
        {
            $sel = ($selected != $key) ? '' : ' selected="selected"';
            $form .= '<option value="'.$key.'"'.$sel.'>'.$val."</option>\n";
        }
    }
    $form .= '</select>';
    
    return $form;
}

?> 

<?php

$so = array(
        'Windows' => array(
                'W95' => '95',
                'W98' => '98',
                'WNT' => 'NT',
                'W2000' => '2000',
                'WXP' => 'XP'
        ),
        'Linux' => array(
                'LRH' => 'RedHat',
                'LDeb' => 'Debian',
                'LSuSE' => 'SuSe',
                'LMDK' => 'Mandrake'
        )
    );

echo form_dropdown('so', $so);

?>

<select name="so">
   <optgroup label="Windows">
      <option value="W95">95</option>
      <option value="W98">98</option>
      <option value="WNT">NT</option>
      <option value="W2000">2000</option>
      <option value="WXP">XP</option>
   </optgroup>
   <optgroup label="Linux">
      <option value="LRH">RedHat</option>
      <option value="LDeb">Debian</option>
      <option value="LSuSe">SuSe</option>
      <option value="LMDK">Mandrake</option>
   </optgroup>
</select> 

Profile

r.tahara

Posted: 24 April 2008 04:19 AM

[ Ignore ] [ # 1 ]

Summer Student

Total Posts: 8

Joined 04-14-2007

How about if I want to pass the optgroup with multiple ? your parameter for the selected not using array. so just one option will have the selected. How about if I want to select more that one option as the default value.. ??

thanks..

Profile

r.tahara

Posted: 24 April 2008 04:45 AM

[ Ignore ] [ # 2 ]

Summer Student

Total Posts: 8

Joined 04-14-2007

After playing a while, I think this would work (combining the the form_dropdown and your code):

if (! function_exists('form_optgroup'))
{
    function form_optgroup($name = '', $options = array(), $selected = array(), $extra = '')
    {
        if ( ! is_array($selected))
        {
            $selected = array($selected);
        }

        if ($extra != '') $extra = ' '.$extra;

        $multiple = (count($selected) > 1 && strpos($extra, 'multiple') === FALSE) ? ' multiple="multiple"' : '';

        $form = '<select name="'.$name.'"'.$extra.$multiple.">\n";

        foreach ($options as $key => $val)
        {
      if(is_array($val))
      {
        $form .= '<optgroup label="'.$key.'">'."\n";
        foreach ($val as $key2 => $val2)
        {

                $sel = (in_array($key2, $selected))?' selected="selected"':'';
          $form .= '<option value="'.$key2.'"'.$sel.'>'.$val2."</option>\n";
        }
        $form .= "</optgroup>\n";
      } else
      {
              $key = (string) $key;
              $val = (string) $val;

              $sel = (in_array($key, $selected))?' selected="selected"':'';

              $form .= '<option value="'.$key.'"'.$sel.'>'.$val."</option>\n";
      }
        }

        $form .= '</select>';

        return $form;
    }
} 

Profile

lucks

Posted: 10 November 2009 05:35 PM

[ Ignore ] [ # 3 ]

Summer Student

Total Posts: 2

Joined 06-07-2008

Thanks a lot r.tahara , you function works perfectly !, regards.

Less code, in the moment when you need to retrieve the results, in my case, I just used:

in my controller:
foreach($query_sql->result() as $row)
{
$a_array[$row->category][$row->id] = $row->titulo;
}
$id_areas_estudios = $a_array;
———————————————————
and in my view :
echo form_optgroup(‘id_area_estudio’, $id_areas_estudios);

this produce:

<select name=“id_area_estudio”>
<optgroup label=“Comunicacion y Ciencias sociales”>
<option value=“1”>Antropología</option>
<option value=“2”>Ciencias Políticas</option>
<option value=“3”>Comunicación Audiovisual</option>
<option value=“4”>Comunicación Social</option>
<option value=“5”>Intérprete</option>
<option value=“6”>Periodismo</option>
<option value=“7”>Publicidad</option>
<option value=“8”>Relaciones Internacionales</option>
<option value=“9”>Relaciones Públicas</option>
<option value=“10”>Sociología</option>
<option value=“11”>Trabajo Social</option>
<option value=“12”>Traducción</option>
</optgroup>
</select>

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