I know this is an old post, but you can grab the field label from the ‘posts’ table.
if (!function_exists('getAcfLabelByName')) {
function getAcfLabelByName($fieldName = null) {
if (empty($fieldName)) {
return 'No field name specified';
}
// set a default in case there's an exception
$fieldLabel = 'Not Found';
try {
/**
* ACF stores the the Labels in the
* wp_posts table, where the ACF label is the title
* and the excerpt is the field name
*/
global $wpdb;
$tableName = "{$wpdb->prefix}posts";
$labelReturned = $wpdb->get_var( $wpdb->prepare( "SELECT post_title FROM $tableName
WHERE post_type = %s AND post_excerpt = %s", 'acf-field', $fieldName ));
// grab the post_title from the result
$fieldLabel = !empty($labelReturned) ? $labelReturned : 'Not Found';
} catch (Exception $e) {
$error = $e->getMessage();
error_log("There was an exception finding the ACF field label by name with the message $error");
}
return $fieldLabel;
}
}
You can then use this like:
$fieldLabel = getAcfLabelByName('field_name_here');
For what it’s worth I created a simple plugin to add this function to your site:
https://wordpress.org/plugins/get-acf-field-label-from-name/
