Reply To: Get field key by field name

• ethernek

• April 17, 2018 at 12:41 am

Thank you very much! I did a slight modification in order to be able to retrieve the name or the field key depending what is given, because I needed the exact opposite. I paste it here for future reference to others. Cheers!

function acf_get_field_info( $return = 'name', $field_key, $post_id ) {
		global $wpdb;
		//choose name 
		if($return == 'name'){
			$acf_fields = $wpdb->get_results( $wpdb->prepare( "SELECT ID,post_parent,post_excerpt FROM $wpdb->posts WHERE post_name=%s AND post_type=%s" , $field_key , 'acf-field' ) );
		}elseif($return == 'key'){
			$acf_fields = $wpdb->get_results( $wpdb->prepare( "SELECT ID,post_parent,post_name FROM $wpdb->posts WHERE post_excerpt=%s AND post_type=%s" , $field_key , 'acf-field' ) );
		}
		// get all fields with that name.
		switch ( count( $acf_fields ) ) {
			case 0: // no such field
				return false;
			case 1: // just one result.
				return $acf_fields[0]->post_excerpt;
		}
		// result is ambiguous
		// get IDs of all field groups for this post
		$field_groups_ids = array();
		$field_groups = acf_get_field_groups( array(
			'post_id' => $post_id,
		) );
		foreach ( $field_groups as $field_group )
			$field_groups_ids[] = $field_group['ID'];

		// Check if field is part of one of the field groups
		// Return the first one.
		foreach ( $acf_fields as $acf_field ) {
			if ( in_array($acf_field->post_parent,$field_groups_ids) )
				return $acf_field->post_name;
		}
		return false;
	}