Choice Groups
Organize Drop Down and Multi Select choices into visual groups using special heading choices.
Instructions
See “Where do I put snippets?” in our documentation for installation instructions.
Code
Filename: gw-choice-groups.php
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<?php
/**
* Gravity Wiz // Gravity Forms // Choice Groups
* https://gravitywiz.com/
*
* Organize Drop Down and Multi Select choices into visual groups using special heading choices.
*
* Example:
*
* [Category 1]
* First Choice
* Second Choice
* [Category 2]
* Choice A
* Choice B
*
* Supported Fields:
* - Drop Down
* - Multi Select
*
* Plugin Name: Gravity Forms - Choice Groups for Drop Down and Multi Select
* Plugin URI: https://gravitywiz.com/
* Description: Organize Drop Down and Multi Select choices into visual groups using special heading choices.
* Author: Gravity Wiz
* Version: 0.1
* Author URI: https://gravitywiz.com/
*/
class GW_Choice_Groups {
const GROUP_PATTERN = '/^\[(.+)\]$/';
public function __construct() {
add_filter( 'gform_field_input', array( $this, 'field_input' ), 10, 5 );
}
public function field_input( $input, $field, $value, $entry_id, $form_id ) {
if ( ! in_array( $field->type, array( 'select', 'multiselect' ), true ) ) {
return $input;
}
if ( ! $this->has_groups( $field->choices ) ) {
return $input;
}
$is_multiselect = $field->type === 'multiselect';
$groups = $this->get_groups( $field->choices );
$field_id = (int) $field->id;
$select_attributes = array(
sprintf( 'name="%s"', esc_attr( $is_multiselect ? 'input_' . $field_id . '[]' : 'input_' . $field_id ) ),
sprintf( 'id="input_%d_%d"', $form_id, $field_id ),
sprintf( 'class="%s"', esc_attr( $is_multiselect ? 'gfield_multiselect' : 'medium gfield_select' ) ),
);
if ( $is_multiselect ) {
$select_attributes[] = 'multiple="multiple"';
$select_attributes[] = 'size="5"';
}
$tabindex = $field->get_tabindex();
if ( $tabindex ) {
$select_attributes[] = trim( $tabindex );
}
$input = sprintf(
'<select %s>',
implode( ' ', $select_attributes )
);
if ( ! $is_multiselect && ! empty( $field->placeholder ) ) {
$input .= sprintf(
'<option value="">%s</option>',
esc_html( $field->placeholder )
);
}
foreach ( $groups as $group ) {
if ( isset( $group['label'] ) ) {
$input .= sprintf(
'<optgroup label="%s">',
esc_attr( $group['label'] )
);
foreach ( $group['choices'] as $choice ) {
$input .= $this->get_option_markup( $choice, $value );
}
$input .= '</optgroup>';
} else {
$input .= $this->get_option_markup( $group, $value );
}
}
$input .= '</select>';
return $input;
}
private function has_groups( $choices ) {
foreach ( $choices as $choice ) {
if ( preg_match( self::GROUP_PATTERN, trim( rgar( $choice, 'text' ) ) ) ) {
return true;
}
}
return false;
}
private function get_groups( $choices ) {
$groups = array();
$current_group_index = null;
foreach ( $choices as $choice ) {
$text = trim( rgar( $choice, 'text' ) );
if ( preg_match( self::GROUP_PATTERN, $text, $matches ) ) {
$groups[] = array(
'label' => trim( $matches[1] ),
'choices' => array(),
);
$current_group_index = count( $groups ) - 1;
continue;
}
if ( $current_group_index !== null ) {
$groups[ $current_group_index ]['choices'][] = $choice;
} else {
$groups[] = $choice;
}
}
return $groups;
}
private function get_option_markup( $choice, $value ) {
$choice_value = rgar( $choice, 'value' );
if ( $choice_value === '' || $choice_value === null ) {
$choice_value = rgar( $choice, 'text' );
}
$selected = '';
if ( is_array( $value ) ) {
if ( in_array( (string) $choice_value, array_map( 'strval', $value ), true ) ) {
$selected = ' selected="selected"';
}
} elseif ( (string) $choice_value === (string) $value ) {
$selected = ' selected="selected"';
}
return sprintf(
'<option value="%s"%s>%s</option>',
esc_attr( $choice_value ),
$selected,
esc_html( rgar( $choice, 'text' ) )
);
}
}
new GW_Choice_Groups();