mysql_fetch_array(): Fetch a result row as a array, regular array from database.

mysql_fetch_object: Fetch a result row as object from database.

mysql_fetch_row: Returns a result row as regular array.

mysql_fetch_array() - Fetch the all matching records of results.
mysql_fetch_object() - Fetch the first single matching record of results.
mysql_fetch_row() - fetches a result row as array.