当循环遍历MySQL结果集时，PHP'允许的内存大小为67108864字节已用尽'

Ever since developing my first mySQL project about 7 years ago, I've been using the same set of simple functions for accessing the database (though, have recently put these into a Database class). As the projects I develop have become more complex, there are many more records in the database and, as a result, greater likelihood of memory issues.Ever since developing my first mySQL project ab