PHP multidimensional array element operation class method

There is a multi-dimensional array element operation class in my framework. It is mainly used to read configuration data in the array. It can obtain and set elements through string nodes: a.b.c, as well as cover multi-dimensional arrays. If you need it, you can refer to it. Get off!

<?php
/**
 * Created by PhpStorm.
 * User: ZHOUZ
 * Date: 14-5-25
 * Time: 下午5:32
 */

namespace Snail\Component;

/**
 * 多维数组节点读写
 * Class Node
 * @package Snail\Component
 */
class Node extends AComponent
{
  /**
   * 多维数组节点分隔符
   * @var string
   */
  const SP = &#39;.&#39;;

  /**
   * 将非字符串类型数据生成字符串节点
   * <code>
   * Node::create(array(&#39;a&#39;, &#39;b&#39;, 1, true)) => &#39;a.b.1.1&#39;
   * Node::create(&#39;a&#39;, &#39;b&#39;, null, false)  => &#39;a.b&#39;
   * </code>
   * @param mixed $nodes 支持数组、任意参数个数
   * @return string
   */
  public static function create($nodes) {
    ! is_array($nodes) && $nodes = func_get_args();
    return join(static::SP, array_filter(array_map(&#39;strval&#39;, $nodes)));
  }

  /**
   * 获取多维数组节点转化为数组键名
   * @param string $node
   * @return array
   */
  public static function explode($node) {
    return explode(static::SP, $node);
  }

  /**
   * 设置多维数组节点值
   * 注意：
   * 由于 PHP 数组数值键名长度只支持 int 的最大长度，
   * 为避免出现覆盖等混乱现象，所有节点在转化为键名时都将
   * 强制被转换为字符串类型
   * @param array & $arr 引用被操作数组的内存地址
   * @param string $node 节点路径, 如: a.b.c => $arr[&#39;a&#39;][&#39;b&#39;][&#39;c&#39;];
   * @param mixed $value
   * @return void
   */
  public static function set(array & $arr, $node, $value = null) {
    $arr = $arr2 = (array) $arr;
    $keys = static::explode($node);
    foreach ($keys as $key) {
      $key = strval($key);
      if (isset($arr[$key])) {
        $arr = & $arr[$key];
      } else {
        $arr[$key] = array();
        $arr = & $arr[$key];
      }
    }
    $arr = $value;
  }

  /**
   * 获取多维数组指定节点值
   * @param array & $arr 引用被操作数组的内存地址
   * @param string $node 节点路径, 如: a.b.c => $arr[&#39;a&#39;][&#39;b&#39;][&#39;c&#39;];
   * @param null|mixed $default 若节点不存在时返回该默认值
   * @return mixed
   */
  public static function get(array & $arr, $node, $default = null) {
    if (empty($arr)) return $default;
    $keys = static::explode($node);
    foreach ($keys as $key) {
      $key = strval($key);
      if (isset($arr[$key])) {
        $arr = & $arr[$key];
      } else {
        return $default;
      }
    }
    return $arr;
  }

  /**
   * 将第二个多维数组覆盖或添加到第一个多维数组进行合并
   * @param array & $arraySrc 引用被更新的数组
   * @param array & $arrayReplace 引用需要合并的数据
   * @return void 地址操作无返回值
   */
  public static function merge(array & $arraySrc, array & $arrayReplace) {
    if (empty($arrayReplace)) return;
    foreach ($arrayReplace as $k=>& $v) {
      if (is_array($v) && isset($arraySrc[$k])) {
        static::merge($arraySrc[$k], $v);
      } else {
        $arraySrc[$k] = $v;
      }
    }
  }

  /**
   * 判断多维数组中是否存在指定节点,
   * 结果同 isset 关键字 (若存在键但值为 NULL 则也会返回 false)
   * @param array & $arr 引用原数组
   * @param string $node
   * @return bool
   */
  public static function has(array & $arr, $node) {
    if (empty($arr)) return false;
    $keys = static::explode($node);
    foreach ($keys as $key) {
      $key = strval($key);
      if (isset($arr[$key])) {
        $arr = & $arr[$key];
      } else {
        return false;
      }
    }
    return true;
  }

  /**
   * 判断多维数组中是否存在指定键
   * @param array & $arr 引用原数组
   * @param string $node
   * @return bool
   */
  public static function hasKey(array & $arr, $node) {
    if (empty($arr)) return false;
    $keys = static::explode($node);
    foreach ($keys as $key) {
      $key = strval($key);
      if (array_key_exists($key, $arr)) {
        $arr = & $arr[$key];
      } else {
        return false;
      }
    }
    return true;
  }

  /**
   * 注销数组中的指定节点元素
   * @param array $arr
   * @param string $node
   * @return void
   */
  public static function clear(array & $arr, $node) {
    if (empty($arr)) return;
    $keys = static::explode($node);
    foreach ($keys as $key) {
      $key = strval($key);
      if (isset($arr[$key])) {
        $arr = & $arr[$key];
      } else {
        return; // 指定节点不存在亦认为是成功
      }
    }
    $arr = null;
    unset($arr);
  }
}

Here is an example:

<?php
echo &#39;<pre class="brush:php;toolbar:false">&#39;;
// 测试数组1
$arr1 = [&#39;a&#39;=>[&#39;b&#39;=>[&#39;c&#39;=>[&#39;d&#39;=>[&#39;e&#39;=>[&#39;f&#39;=>&#39;http://blog.csdn.net/zhouzme&#39;]]]]]];
// 测试数组2
$arr2 = [&#39;a&#39;=>[&#39;b&#39;=>[&#39;c&#39;=>[&#39;h&#39;=>[&#39;i&#39;=>[&#39;j&#39;=>&#39;http://www.hihtml5.com/&#39;]]]]]];

echo &#39;读取已存在的多维元素: &#39;;
echo Node::get($arr1, &#39;a.b.c.d.e.f&#39;, &#39;默认值&#39;); // http://www.php.cn/ echo &#39;<hr>&#39;;

echo &#39;读取不存在的多维元素: &#39;;
echo Node::get($arr1, &#39;a.b.c.d.e.g&#39;, &#39;默认值&#39;); // 默认值
echo &#39;<hr>&#39;;

echo &#39;新增多维元素: &#39;;
Node::set($arr1, &#39;a.b.c.d.e.g&#39;, &#39;http://www.ai9475.com/&#39;);
print_r($arr1);
echo &#39;<hr>&#39;;

echo &#39;读取新增的多维元素: &#39;;
echo Node::get($arr1, &#39;a.b.c.d.e.g&#39;, &#39;默认值&#39;); // http://www.php.cn/ echo &#39;<hr>&#39;;

echo &#39;合并两个数组<br>&#39;;
Node::merge($arr1, $arr2);
print_r($arr1);

The following is the corresponding output result:

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