Copy a function to a new function name

# runkit7_function_copy

(PECL runkit7 >= Unknown)

runkit7_function_copy — Copy a function to a new function name

### 说明

function runkit7_function_copy(string `$source_name`, string `$target_name`): bool

### 参数

`source_name`
  Name of the existing function
`target_name`
  Name of the new function to copy the definition to

### 返回值

成功时返回 `true`， 或者在失败时返回 `false`。

### 示例

示例 #1 A runkit7_function_copy() example

    <?php
    function original() {
      echo "In a function\n";
    }
    runkit7_function_copy('original','duplicate');
    original();
    duplicate();
    ?>

以上示例会输出：

    In a function
    In a function

### 参见

- runkit7_function_add() - Add a new function, similar to create_function
- runkit7_function_redefine() - Replace a function definition with a new implementation
- runkit7_function_rename() - Change a function's name
- runkit7_function_remove() - Remove a function definition

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