function update_sub_field($selector, $value, $post_id = false)
{
// filter post_id
$post_id = acf_get_valid_post_id($post_id);
// vars
$field = false;
// within a have_rows loop
if (is_string($selector)) {
// get current row
$row = acf_get_loop('active');
// override $post_id
$post_id = $row['post_id'];
// attempt to find sub field
$field = get_row_sub_field($selector);
// create dummy field
if (!$field) {
$field = acf_get_valid_field(array('name' => "{$row['name']}_{$row['i']}_{$selector}", 'key' => '', 'type' => ''));
}
} elseif (is_array($selector)) {
// validate
if (count($selector) < 3) {
return false;
}
// vars
$parent_name = acf_extract_var($selector, 0);
// load parent
$field = acf_maybe_get_field($parent_name, $post_id);
// add to name
$name = $field['name'];
// sub fields
foreach ($selector as $s) {
if (is_numeric($s)) {
// get row index
$row_i = intval($s) - 1;
// add to name
$name .= "_{$row_i}";
} else {
// update parent
$field = acf_get_sub_field($s, $field);
// create dummy field
if (!$field) {
$field = acf_get_valid_field(array('name' => $s, 'key' => '', 'type' => ''));
}
// add to name
$name .= "_{$field['name']}";
}
// if
}
// foreach
// update name
$field['name'] = $name;
}
// delete
if ($value === null) {
return acf_delete_value($post_id, $field);
}
// update
return acf_update_value($value, $post_id, $field);
}
function get_sub_field_choice_label($selector, $value)
{
$row = acf_get_loop('active');
if (!$row) {
return NULL;
}
$sub_field = get_row_sub_field($selector);
if (!$sub_field || !isset($sub_field['choices']) || !isset($sub_field['choices'][$value])) {
return NULL;
}
return $sub_field['choices'][$value];
}
function delete_sub_row($selector, $i = 1, $post_id = false)
{
// vars
$sub_field = false;
$i--;
// filter post_id
$post_id = acf_get_valid_post_id($post_id);
// get sub field
if (is_array($selector)) {
$sub_field = acf_maybe_get_sub_field($selector, $post_id, false);
} else {
$sub_field = get_row_sub_field($selector);
}
// bail early if no sub field
if (!$sub_field) {
return false;
}
// get raw value
$value = acf_get_value($post_id, $sub_field);
// ensure array
$value = acf_get_array($value);
// append
unset($value[$i]);
// update
return acf_update_value($value, $post_id, $sub_field);
}
