Hướng dẫn php const object
It is possible to define constants on a per-class basis remaining the same and unchangeable. The default visibility of class constants is
It's also possible for interfaces to have It's possible to reference the class using a variable. The variable's value can not be a keyword (e.g. Note that class constants are allocated once per class, and not for each class instance. Example #1 Defining and using a constant
showConstant() { The special Example #2 Namespaced ::class example
bar::class; // foo\bar Example #3 Class constant expression example
Example #4 Class constant visibility modifiers, as of PHP 7.1.0
Output of the above example in PHP 7.1: bar Fatal error: Uncaught Error: Cannot access private const Foo::BAZ in …
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$small = 'SAME CONTSNAT NAME AS PROPERTIES.'; //Fatal error: Cannot redefine class constant MyClass::small in constant.php David Spector ¶ 4 years ago
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