Proposal: Create a function get_class_constants() It would be similar to get_class_methods() and get_class_vars(). Proposal for RFC: get_class_constants() Groups: php.internals : Hi, following the howto for RFCs and since this would be my first one, I'd like to ask for your thoughts if such an RFC might find approval.

Previous Page. However, it is recommended to name the constants in all uppercase letters. Either define a constant in the abstract class (thus every child class has a constant, even if it does not define its own), or use an abstract function (which forces every child class to define its own). Class constants can be useful if you need to define some constant data within a class. Get all the constants defined in the class, loop over them and compare the values of those constants with the value of your variable. PHP What is OOP PHP Classes/Objects PHP Constructor PHP Destructor PHP Access Modifiers PHP Inheritance PHP Constants PHP Abstract Classes PHP Traits PHP Static Methods PHP Static Properties MySQL Database MySQL Database MySQL Connect MySQL Create DB MySQL Create Table MySQL Insert Data MySQL Get Last ID MySQL Insert Multiple MySQL Prepared MySQL Select Data MySQL Where …
constants class in php. A constant is a name or an identifier for a simple value. If yes, I'll be happy to work on it. This post looks at how to use the get_defined_constants() function and example output from it. But I can't create a class constant from an expression like that: The value must be a constant expression, not (for example) a variable, a property, a result of a mathematical operation, or a function call. It is possible to define constants as a resource, but it should be avoided, as it can cause unexpected results. The value cannot be changed during the script. Viewed 3k times 3. PHP - Constants Types.

Ask Question Asked 10 years, 11 months ago. The get_defined_constants() function takes one optional parameter, which specifies whether or not to categorise the constants. Constants cannot be changed once it is declared. Proposal: Create a function get_class_constants() It would be similar to get_class_methods() and get_class_vars(). Some simple timings show that through reflection retrieving these values is 2-3 times slower than providing a … Edit: the short answer to your question is no. get_object_constants and get_class_constants Currently this can only be done through ReflectionClass which is far slower than retrieving them directly from the constants table. I once heard it's good to have one class with all your application constants so that you have only one location with all your constants. Note: Unlike variables, constants are automatically global across the entire script. By default, a constant is case-sensitive. Class constants are case-sensitive. Note that with this approach you might get some other constant that the one you want, if there are two constants with the same value. CONSTANTS and PHP Class Definitions Using "define('MY_VAR', 'default value')" INSIDE a class definition does not work as expected.
Like static members, constant values can not be accessed from an instance of the object.