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The Pcntl\QosClass Enum

The Pcntl\QosClass enum is used to specify the user process priority with pcntl_setqos_class.

Intro

The Pcntl\QosClass enum is used to specify the user process priority with pcntl_setqos_class().

Enumsynopsis

PcntlQosClassUserInteractiveRuns the process as the highest priority level.UserInitiatedRuns the process at high priority level but below UserInteractive ones.DefaultRuns the process after all high-priority processes but before the low-priority ones.UtilityPcntl\QosClass::Utility descriptionBackgroundRuns the process after all high-priority ones had ran their courses.

Source: reference/pcntl/pcntl.qosclass.xml · from the official PHP manual (php/doc-en)