SPL is a collection of interfaces and classes that are meant to solve standard problems.
A more detailed documentation of SPL can be found » here.
This extension is available and compiled by default in PHP 5.
Konstanterna nedan defineras av den här utbyggnaden, och kommer bara vara tillgängliga då utbyggnaden kompilerats med PHP eller laddats dynamiskt.
SPL uses class constants since PHP 5.1. Prior releases use global constants in the form RIT_LEAVES_ONLY.