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 block an IP range based on CIDR in Apache with .htaccess

How to view all installed PHP modules?

What are Apache MPMs?

How to show a specific view file for certain error codes?

How to add a name prefix to all routes in a group?

How to convert a string to an array of it's characters in PHP?

How to pick what array_intersect function to use in PHP?

How to set up custom error pages in .htaccess for your Apache server (ErrorDocument)

How to block IPv6 IP addresses in .htaccess

How to eager load multiple levels of relationships in Eloquent?