runkit7_constant_add

(PECL runkit7 >= Unknown)

runkit7_constant_add — Similar to define(), but allows defining in class definitions as well

runkit7_constant_add(string $constant_name, mixed $value, int $newVisibility = ?): bool

constant_name: Name of constant to declare. Either a string to indicate a global constant, or classname::constname to indicate a class constant.
value: NULL, Bool, Long, Double, String, Array, or Resource value to store in the new constant.
newVisibility: Visibility of the constant, for class constants. Public by default. One of the RUNKIT7_ACC_* constants.

成功时返回 true，或者在失败时返回 false。

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