Aggregation

• Collector
• Default Collectors
  • Row counter collector
  • Group counter collector
  • Total collector
• Row counter
• Group counter
  • Add items
  • Alternate item keys
  • Get items
  • Aggregate methods
  • Subset of items
  • More specific groups
• Calculator
• Sheet
  • FixedSheet class
  • Sheet class

phpReport manages aggregation by using calculator classes organized in collector classes.

Three different calculator classes provides different sets of aggregation methods. Sheets are special variants of an collector. They are used to hold multiple calculator ojects of the same type.