Performance

includes/class-give-db.php

@@ -102,6 +102,11 @@ public function get( $row_id ) {
 		/* @var WPDB $wpdb */
 		global $wpdb;
 
+		// Bailout.
+		if ( empty( $row_id ) ) {
+			return null;
+		}
+
 		return $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $this->table_name WHERE $this->primary_key = %s LIMIT 1;", $row_id ) );
 	}
 
@@ -111,16 +116,22 @@ public function get( $row_id ) {
 	 * @since  1.0
 	 * @access public
 	 *
-     * @param  int $column Column ID.
-     * @param  int $row_id Row ID.
-     *
-     * @return object
+	 * @param  int $column Column ID.
+	 * @param  int $row_id Row ID.
+	 *
+	 * @return object
 	 */
 	public function get_by( $column, $row_id ) {
-        /* @var WPDB $wpdb */
-        global $wpdb;
+		/* @var WPDB $wpdb */
+		global $wpdb;
+
+		// Bailout.
+		if ( empty( $column ) || empty( $row_id ) ) {
+			return null;
+		}
 
 		$column = esc_sql( $column );
+
 		return $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $this->table_name WHERE $column = %s LIMIT 1;", $row_id ) );
 	}
 
@@ -129,17 +140,23 @@ public function get_by( $column, $row_id ) {
 	 *
 	 * @since  1.0
 	 * @access public
-     *
-     * @param  int $column Column ID.
-     * @param  int $row_id Row ID.
-     *
+	 *
+	 * @param  int $column Column ID.
+	 * @param  int $row_id Row ID.
+	 *
 	 * @return string      Column value.
 	 */
 	public function get_column( $column, $row_id ) {
-        /* @var WPDB $wpdb */
-        global $wpdb;
+		/* @var WPDB $wpdb */
+		global $wpdb;
+
+		// Bailout.
+		if ( empty( $column ) || empty( $row_id ) ) {
+			return null;
+		}
 
 		$column = esc_sql( $column );
+
 		return $wpdb->get_var( $wpdb->prepare( "SELECT $column FROM $this->table_name WHERE $this->primary_key = %s LIMIT 1;", $row_id ) );
 	}
 
@@ -159,6 +176,11 @@ public function get_column_by( $column, $column_where, $column_value ) {
         /* @var WPDB $wpdb */
         global $wpdb;
 
+		// Bailout.
+		if ( empty( $column ) || empty( $column_where ) || empty( $column_value ) ) {
+			return null;
+		}
+
 		$column_where = esc_sql( $column_where );
 		$column       = esc_sql( $column );
 		return $wpdb->get_var( $wpdb->prepare( "SELECT $column FROM $this->table_name WHERE $column_where = %s LIMIT 1;", $column_value ) );

includes/class-give-donor.php

@@ -141,7 +141,7 @@ class Give_Donor {
 	 */
 	public function __construct( $_id_or_email = false, $by_user_id = false ) {
 
-		$this->db = new Give_DB_Donors();
+		$this->db = Give()->donors;
 
 		if (
 			false === $_id_or_email