# ReflectionConstant::getExtension

(PHP 8 >= 8.5.0)

ReflectionConstant::getExtension — Gets ReflectionExtension of the defining extension

### 说明

public ReflectionConstant::getExtension(): ?ReflectionExtension

Gets a ReflectionExtension object for the extension which defined the constant.

### 参数

此函数没有参数。

### 返回值

A ReflectionExtension object representing the extension which defined the constant, or `null` for user-defined constants.

### 示例

示例 #1 Basic usage of ReflectionConstant::getExtension()

`<?php
var_dump((new ReflectionConstant('SQLITE3_TEXT'))->getExtension());
?>`

以上示例会输出：

    object(ReflectionExtension)#2 (1) {
      ["name"]=>
      string(7) "sqlite3"
    }

### 参见

- ReflectionConstant::getExtensionName() - Gets name of the defining extension

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