How to generate an array

How to generate an array has two fields $ cont_type and $ cont_id in a table in the mysql database, and each of them has more than one record, how do I generate such a 2-dimensional array? $ tarTree [$ cont_type] [] = $ cont_id; do I use mysql_fetch_row ()?

Reply to discussion (solution)

// After reading the code, generate a two-dimensional array and paste the sample code directly.

 

Implementation
1. read data in one row and one row
2. each time a row of data is read, $ row ['cont _ type'] is passed to $ tarTree as a key, $ row ['cont _ id'] is passed as the key value to the two-dimensional array.

A classic example is also applicable to YII.