more limit for user

[تعلم البرمجة]

hello and alsalamo alikom

i have array in db

			array (
			0 {
				start-Timestamp = 05:30
				end-Timestamp = 07:30
                Mikrotik-Rate-Limit = 256k/512k				
			}	
			1 {
				start-Timestamp = 07:30
				end-Timestamp = 09:30
                Mikrotik-Rate-Limit = 512k/1024k				
			}
		
			
			)
			 I want Change Mikrotik-Rate-Limit When Equal any thing of this Values By COA

              If Freeradius Dosent support Array How I can Do This ?

Best Regards