Remove/Delete an already defined constant

# runkit7_constant_remove

(PECL runkit7 >= Unknown)

runkit7_constant_remove — Remove/Delete an already defined constant

### 説明

function runkit7_constant_remove(string `$constant_name`): bool

### パラメータ

`constant_name`
  Name of the constant to remove. Either the name of a global constant, or `classname::constname` indicating a class constant.

### 戻り値

成功した場合に `true` を、失敗した場合に `false` を返します。

### 参考

- define() - 名前を指定して定数を定義する
- runkit7_constant_add() - Similar to define(), but allows defining in class definitions as well
- runkit7_constant_redefine() - Redefine an already defined constant

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