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Example code of jbzoo/event

Informations about the package event

JBZoo / Event

CI Coverage Status Psalm Coverage Psalm Level CodeFactor
Stable Version Total Downloads Dependents GitHub License

The EventEmitter is a simple pattern that allows you to create an object that emits events, and allow you to listen to those events.

Install

Simple example

Set priority

By supplying a priority, you are ensured that subscribers handle in a specific order. The default priority is EventManager::MID. Anything below that will be triggered earlier, anything higher later. If there are two subscribers with the same priority, they will execute in an undefined, but deterministic order.

Types of Callback

All default PHP callbacks are supported, so closures are not required.

Cancel queue of events

Passing arguments

Arguments can be passed as an array.

Because you cannot really do anything with the return value of a listener, you can pass arguments by reference to communicate between listeners and back to the emitter.

Namespaces

Summary benchmark info (execution time) PHP v7.4

All benchmark tests are executing without xdebug and with a huge random array and 100.000 iterations.

Benchmark tests based on the tool phpbench/phpbench. See details here.

Please, pay attention - 1μs = 1/1.000.000 of second!

benchmark: ManyCallbacks

subject groups its revs mean stdev rstdev mem_real diff
benchOneUndefined undefined 10 100000 0.65μs 0.01μs 1.00% 6,291,456b 1.00x
benchOneWithStarBegin *.bar 10 100000 0.67μs 0.01μs 1.44% 6,291,456b 1.04x
benchOneWithAllStars *.* 10 100000 0.68μs 0.03μs 4.18% 6,291,456b 1.04x
benchOneWithStarEnd foo.* 10 100000 0.68μs 0.01μs 1.24% 6,291,456b 1.04x
benchOneNested foo.bar 10 100000 43.23μs 0.46μs 1.07% 6,291,456b 66.56x
benchOneSimple foo 10 100000 45.07μs 2.63μs 5.83% 6,291,456b 69.39x

benchmark: ManyCallbacksWithPriority

subject groups its revs mean stdev rstdev mem_real diff
benchOneUndefined undefined 10 100000 0.65μs 0.01μs 1.35% 6,291,456b 1.00x
benchOneNestedStarAll *.* 10 100000 0.67μs 0.01μs 1.34% 6,291,456b 1.03x
benchOneWithStarBegin *.bar 10 100000 0.67μs 0.01μs 1.10% 6,291,456b 1.04x
benchOneWithStarEnd foo.* 10 100000 0.68μs 0.01μs 1.13% 6,291,456b 1.05x
benchOneSimple foo 10 100000 4.54μs 0.02μs 0.35% 6,291,456b 7.03x
benchOneNested foo.bar 10 100000 4.58μs 0.04μs 0.81% 6,291,456b 7.10x

benchmark: OneCallback

subject groups its revs mean stdev rstdev mem_real diff
benchOneWithStarBegin *.bar 10 100000 0.69μs 0.03μs 4.00% 6,291,456b 1.00x
benchOneWithStarEnd foo.* 10 100000 0.70μs 0.03μs 4.22% 6,291,456b 1.00x
benchOneNestedStarAll *.* 10 100000 0.70μs 0.04μs 6.02% 6,291,456b 1.01x
benchOneUndefined undefined 10 100000 0.71μs 0.05μs 7.44% 6,291,456b 1.02x
benchOneSimple foo 10 100000 1.18μs 0.03μs 2.27% 6,291,456b 1.70x
benchOneNested foo.bar 10 100000 1.25μs 0.03μs 2.46% 6,291,456b 1.81x

benchmark: Random

subject groups its revs mean stdev rstdev mem_real diff
benchOneSimple random.*.triggers 10 100000 4.29μs 0.33μs 7.69% 6,291,456b 1.00x

Unit tests and check code style

License

MIT

All versions of event with dependencies

PHP Build Version
Package Version
Requires php Version ^8.1
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