


Official release of PHP syntax specifications, release of PHP syntax_PHP tutorial
Official release of PHP syntax specification, release of php syntax
The PHP language has been around for more than 20 years and is obviously one of the most popular programming languages in the world. PHP is definitely the lingua franca of server-side web programming on the Internet.
Despite extensive user-documentation, the PHP language has always missed the language specification. This is not to say that a specification is not considered or discussed. Just one that never really came to fruition.
Chinese philosopher Lao Tzu said, “A journey of a thousand miles begins with a single step.” We are excited to announce the first draft of a specification for PHP.
The existence of the specification was announced by Sarah at OSCON 2014. Feedback and sample chapters have been overwhelmingly positive.
Now, the entire first draft of the specification has been released. Hosted in the php.net git repository, this repo will be mirrored on GitHub. Please read the specifications. Provide your requests and feedback. It is our hope and expectation that this specification will evolve over time to help everyone who cares about the PHP language.
Thank you to the PHP group for bringing Mantle and providing the hosting infrastructure to spec further development and helping Shepherd this is a true community owned and developed project.
Special thanks must go to Rex Jaeschke, who led the actual writing of the spec, and to Jean Paroski, who was critical in reviewing the work and helping shape the Rex spec into its original form. Thanks to Paul Tarjan, Sara Golemon, Wattsman, Fred Emmott, Josh and the rest of the HHVM team for their great contributions and feedback. Thanks to Stanislav Marisson and Nikita Popov for taking an early look at the spec and providing valuable feedback.
Language specification programming may not be the best thing in the world, but, in my opinion, it is an exciting PHP language.
Original text: http://hhvm.com/blog/5723/announcing-a-specification-for-php
Github hosting address: https://github.com/php/php-langspec/tree/master/spec
php is different from other programming languages!
When there is no other code (html, javascript, css, etc.) behind the php code, you can generally omit the end symbol?>
and most people will do this
This is beneficial to the program The optimization is to avoid extra spaces when the file is included in other files
Iandug said it is a bit extreme
For example:
The operation is not affected at all
Wouldn’t it be easier to consult the manual for this kind of problem?
There are a series of magic constants in PHP, which are characterized by double underscores at the beginning and end, among which __FILE__ is the most commonly used.
__METHOD__ method name of class (newly added in PHP 5.0.0). Returns the name of the method as it was defined (case-sensitive).

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