(PHP 5 >= 5.1.2, PHP 7, PHP 8)
ReflectionClass::hasConstant — Checks if constant is defined
Checks whether the class has a specific constant defined or not.
nameThe name of the constant being checked for.
Приклад #1 ReflectionClass::hasConstant() example
<?php
class Foo {
const c1 = 1;
}
$class = new ReflectionClass("Foo");
var_dump($class->hasConstant("c1"));
var_dump($class->hasConstant("c2"));
?>Поданий вище приклад виведе щось схоже на:
bool(true) bool(false)