Returns a shallow copy of the pair

# Ds\Pair::copy

(No version information available, might only be in Git)

Ds\Pair::copy — Returns a shallow copy of the pair

### 说明

public function Ds\Pair::copy(): Ds\Pair

Returns a shallow copy of the pair.

### 参数

此函数没有参数。

### 返回值

Returns a shallow copy of the pair.

### 示例

示例 #1 Ds\Pair::copy() example

    <?php
    $a = new \Ds\Pair("a", 1);
    $b = $a->copy();

    $a->key = "x";

    print_r($a);
    print_r($b);
    ?>

以上示例的输出类似于：

    Ds\Pair Object
    (
        [key] => x
        [value] => 1
    )
    Ds\Pair Object
    (
        [key] => a
        [value] => 1
    )

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