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November 10, 2023 10:46
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Add the optgroup ability to Gravity Forms default select field.
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/** | |
* Filter Gravity Forms select field display to wrap optgroups where defined | |
* USE: | |
* set the value of the select option to `optgroup` within the form editor. The | |
* filter will then automagically wrap the options following until the start of | |
* the next option group | |
*/ | |
add_filter( 'gform_field_content', 'filter_gf_select_optgroup', 10, 2 ); | |
function filter_gf_select_optgroup( $input, $field ) { | |
if ( $field->type == 'select' ) { | |
$opt_placeholder_regex = strpos($input,'gf_placeholder') === false ? '' : "<\s*?option.*?class='gf_placeholder'>[^<>]+<\/option\b[^>]*>"; | |
$opt_regex = "/<\s*?select\b[^>]*>" . $opt_placeholder_regex . "(.*?)<\/select\b[^>]*>/i"; | |
$opt_group_regex = "/<\s*?option\s*?value='optgroup\b[^>]*>([^<>]+)<\/option\b[^>]*>/i"; | |
preg_match($opt_regex, $input, $opt_values); | |
$split_options = preg_split($opt_group_regex, $opt_values[1]); | |
$optgroup_found = count($split_options) > 1; | |
// sometimes first item in the split is blank | |
if( strlen($split_options[0]) < 1 ){ | |
unset($split_options[0]); | |
$split_options = array_values( $split_options ); | |
} | |
if( $optgroup_found ){ | |
$fixed_options = ''; | |
preg_match_all($opt_group_regex, $opt_values[1], $opt_group_match); | |
if( count($opt_group_match) > 1 ){ | |
foreach( $split_options as $index => $option ){ | |
$fixed_options .= "<optgroup label='" . $opt_group_match[1][$index] . "'>" . $option . '</optgroup>'; | |
} | |
} | |
$input = str_replace($opt_values[1], $fixed_options, $input); | |
} | |
} | |
return $input; | |
} |
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Exactly what I was looking for. Brilliant! Thank you much.