Event callbacks

If a callback is registered for an event, it will be called when the event becomes active. To associate a callback with event one can pass a callable to either Event::__construct() , or Event::set() , or one of the factory methods like Event::timer() .

An event callback should match the following prototype:

callback( mixed $fd = null , int $what = ?, mixed $arg = null ): void

fd

The file descriptor, stream resource or socket associated with the event. For signal event fd is equal to the signal number.

what

Bit mask of all events triggered.

arg

User custom data.

Event::timer() expects the callback to match the following prototype:

callback( mixed $arg = null ): void

arg

User custom data.

Event::signal() expects the callback to match the following prototype:

callback( int $signum = ?, mixed $arg = null ): void

signum

The number of the triggered signal(e.g. SIGTERM ).

arg

User custom data.

Here you can write a comment


Please enter at least 10 characters.
Loading... Please wait.
* Pflichtangabe
There are no comments available yet.

PHP cURL Tutorial: Using cURL to Make HTTP Requests

cURL is a powerful PHP extension that allows you to communicate with different servers using various protocols, including HTTP, HTTPS, FTP, and more. ...

TheMax

Autor : TheMax
Category: PHP-Tutorials

Midjourney Tutorial - Instructions for beginners

There is an informative video about Midjourney, the tool for creating digital images using artificial intelligence, entitled "Midjourney tutorial in German - instructions for beginners" ...

Mike94

Autor : Mike94
Category: KI Tutorials

Basics of views in MySQL

Views in a MySQL database offer the option of creating a virtual table based on the result of an SQL query. This virtual table can be queried like a normal table without changing the underlying data. ...

admin

Autor : admin
Category: mySQL-Tutorials

Publish a tutorial

Share your knowledge with other developers worldwide

Share your knowledge with other developers worldwide

You are a professional in your field and want to share your knowledge, then sign up now and share it with our PHP community

learn more

Publish a tutorial