How to check if a object has a static variable defined?

PHP: How to check if a object has a static variable defined?

If you have an object and you need to check if it has a const SOME_CONSTANT = 'foo' set, then you can use defined in the following way:

  1.         class ExampleClass {
  2.             const CONST_THAT_DOES_EXIST = 9;
  3.  
  4.             function does_it_have_const() {
  5.             // late static binding:
  6.                 var_dump( defined('static::CONST_THAT_DOES_EXIST') );
  7.                 var_dump( defined('static::CONST_THAT_DOES_NOT_EXIST') );
  8.  
  9.                 // or use self
  10.                 var_dump( defined('self::CONST_THAT_DOES_EXIST') );
  11.             }
  12.  
  13.         }

webdevetc profile pic
webdevetc

I am a 29 year old backend web developer from London, mostly focusing on PHP and Laravel lately. This (webdevetc.com) is my blog where I write about some web development topics (PHP, Laravel, Javascript, and some server stuff). contact me here.



More...


Comments and discussion about How to check if a object has a static variable defined?

Found this interesting? Maybe you want to read some more in this series?

Or see other topics in the PHP language

Or see other languages/frameworks:
PHP Laravel Composer Apache CentOS and Linux Stuff WordPress General Webdev and Programming Stuff JavaScript
Or see random questions

How to set up an alias to map one directory to another destination

What is the difference between reference and primitive data types types in Javascript?

How to install and use jpegoptim on Linux CentOS

How to find the average value of items in a Laravel Collection?

PHP Date commonly used formats

How to find the intersection (same values) from two arrays?

What is Agile software development?

How do you run a PHP script from the command line?

How could you include a custom function for every single time PHP runs?

What are the main error types in PHP