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							- <?php
 
- // +----------------------------------------------------------------------
 
- // | ThinkPHP [ WE CAN DO IT JUST THINK ]
 
- // +----------------------------------------------------------------------
 
- // | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
 
- // +----------------------------------------------------------------------
 
- // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
 
- // +----------------------------------------------------------------------
 
- // | Author: zhangyajun <448901948@qq.com>
 
- // +----------------------------------------------------------------------
 
- namespace think;
 
- use ArrayAccess;
 
- use ArrayIterator;
 
- use Countable;
 
- use IteratorAggregate;
 
- use JsonSerializable;
 
- class Collection implements ArrayAccess, Countable, IteratorAggregate, JsonSerializable
 
- {
 
-     /**
 
-      * @var array 数据
 
-      */
 
-     protected $items = [];
 
-     /**
 
-      * Collection constructor.
 
-      * @access public
 
-      * @param  array $items 数据
 
-      */
 
-     public function __construct($items = [])
 
-     {
 
-         $this->items = $this->convertToArray($items);
 
-     }
 
-     /**
 
-      * 创建 Collection 实例
 
-      * @access public
 
-      * @param  array $items 数据
 
-      * @return static
 
-      */
 
-     public static function make($items = [])
 
-     {
 
-         return new static($items);
 
-     }
 
-     /**
 
-      * 判断数据是否为空
 
-      * @access public
 
-      * @return bool
 
-      */
 
-     public function isEmpty()
 
-     {
 
-         return empty($this->items);
 
-     }
 
-     /**
 
-      * 将数据转成数组
 
-      * @access public
 
-      * @return array
 
-      */
 
-     public function toArray()
 
-     {
 
-         return array_map(function ($value) {
 
-             return ($value instanceof Model || $value instanceof self) ?
 
-                 $value->toArray() :
 
-                 $value;
 
-         }, $this->items);
 
-     }
 
-     /**
 
-      * 获取全部的数据
 
-      * @access public
 
-      * @return array
 
-      */
 
-     public function all()
 
-     {
 
-         return $this->items;
 
-     }
 
-     /**
 
-      * 交换数组中的键和值
 
-      * @access public
 
-      * @return static
 
-      */
 
-     public function flip()
 
-     {
 
-         return new static(array_flip($this->items));
 
-     }
 
-     /**
 
-      * 返回数组中所有的键名组成的新 Collection 实例
 
-      * @access public
 
-      * @return static
 
-      */
 
-     public function keys()
 
-     {
 
-         return new static(array_keys($this->items));
 
-     }
 
-     /**
 
-      * 返回数组中所有的值组成的新 Collection 实例
 
-      * @access public
 
-      * @return static
 
-      */
 
-     public function values()
 
-     {
 
-         return new static(array_values($this->items));
 
-     }
 
-     /**
 
-      * 合并数组并返回一个新的 Collection 实例
 
-      * @access public
 
-      * @param  mixed $items 新的数据
 
-      * @return static
 
-      */
 
-     public function merge($items)
 
-     {
 
-         return new static(array_merge($this->items, $this->convertToArray($items)));
 
-     }
 
-     /**
 
-      * 比较数组,返回差集生成的新 Collection 实例
 
-      * @access public
 
-      * @param  mixed $items 做比较的数据
 
-      * @return static
 
-      */
 
-     public function diff($items)
 
-     {
 
-         return new static(array_diff($this->items, $this->convertToArray($items)));
 
-     }
 
-     /**
 
-      * 比较数组,返回交集组成的 Collection 新实例
 
-      * @access public
 
-      * @param  mixed $items 比较数据
 
-      * @return static
 
-      */
 
-     public function intersect($items)
 
-     {
 
-         return new static(array_intersect($this->items, $this->convertToArray($items)));
 
-     }
 
-     /**
 
-      * 返回并删除数据中的的最后一个元素(出栈)
 
-      * @access public
 
-      * @return mixed
 
-      */
 
-     public function pop()
 
-     {
 
-         return array_pop($this->items);
 
-     }
 
-     /**
 
-      * 返回并删除数据中首个元素
 
-      * @access public
 
-      * @return mixed
 
-      */
 
-     public function shift()
 
-     {
 
-         return array_shift($this->items);
 
-     }
 
-     /**
 
-      * 在数组开头插入一个元素
 
-      * @access public
 
-      * @param mixed $value 值
 
-      * @param mixed $key   键名
 
-      * @return void
 
-      */
 
-     public function unshift($value, $key = null)
 
-     {
 
-         if (is_null($key)) {
 
-             array_unshift($this->items, $value);
 
-         } else {
 
-             $this->items = [$key => $value] + $this->items;
 
-         }
 
-     }
 
-     /**
 
-      * 在数组结尾插入一个元素
 
-      * @access public
 
-      * @param  mixed $value 值
 
-      * @param  mixed $key   键名
 
-      * @return void
 
-      */
 
-     public function push($value, $key = null)
 
-     {
 
-         if (is_null($key)) {
 
-             $this->items[] = $value;
 
-         } else {
 
-             $this->items[$key] = $value;
 
-         }
 
-     }
 
-     /**
 
-      * 通过使用用户自定义函数,以字符串返回数组
 
-      * @access public
 
-      * @param  callable $callback 回调函数
 
-      * @param  mixed    $initial  初始值
 
-      * @return mixed
 
-      */
 
-     public function reduce(callable $callback, $initial = null)
 
-     {
 
-         return array_reduce($this->items, $callback, $initial);
 
-     }
 
-     /**
 
-      * 以相反的顺序创建一个新的 Collection 实例
 
-      * @access public
 
-      * @return static
 
-      */
 
-     public function reverse()
 
-     {
 
-         return new static(array_reverse($this->items));
 
-     }
 
-     /**
 
-      * 把数据分割为新的数组块
 
-      * @access public
 
-      * @param  int  $size         分隔长度
 
-      * @param  bool $preserveKeys 是否保持原数据索引
 
-      * @return static
 
-      */
 
-     public function chunk($size, $preserveKeys = false)
 
-     {
 
-         $chunks = [];
 
-         foreach (array_chunk($this->items, $size, $preserveKeys) as $chunk) {
 
-             $chunks[] = new static($chunk);
 
-         }
 
-         return new static($chunks);
 
-     }
 
-     /**
 
-      * 给数据中的每个元素执行回调
 
-      * @access public
 
-      * @param  callable $callback 回调函数
 
-      * @return $this
 
-      */
 
-     public function each(callable $callback)
 
-     {
 
-         foreach ($this->items as $key => $item) {
 
-             $result = $callback($item, $key);
 
-             if (false === $result) {
 
-                 break;
 
-             }
 
-             if (!is_object($item)) {
 
-                 $this->items[$key] = $result;
 
-             }
 
-         }
 
-         return $this;
 
-     }
 
-     /**
 
-      * 用回调函数过滤数据中的元素
 
-      * @access public
 
-      * @param callable|null $callback 回调函数
 
-      * @return static
 
-      */
 
-     public function filter(callable $callback = null)
 
-     {
 
-         return new static(array_filter($this->items, $callback ?: null));
 
-     }
 
-     /**
 
-      * 返回数据中指定的一列
 
-      * @access public
 
-      * @param mixed $columnKey 键名
 
-      * @param null  $indexKey  作为索引值的列
 
-      * @return array
 
-      */
 
-     public function column($columnKey, $indexKey = null)
 
-     {
 
-         if (function_exists('array_column')) {
 
-             return array_column($this->items, $columnKey, $indexKey);
 
-         }
 
-         $result = [];
 
-         foreach ($this->items as $row) {
 
-             $key    = $value = null;
 
-             $keySet = $valueSet = false;
 
-             if (null !== $indexKey && array_key_exists($indexKey, $row)) {
 
-                 $key    = (string) $row[$indexKey];
 
-                 $keySet = true;
 
-             }
 
-             if (null === $columnKey) {
 
-                 $valueSet = true;
 
-                 $value    = $row;
 
-             } elseif (is_array($row) && array_key_exists($columnKey, $row)) {
 
-                 $valueSet = true;
 
-                 $value    = $row[$columnKey];
 
-             }
 
-             if ($valueSet) {
 
-                 if ($keySet) {
 
-                     $result[$key] = $value;
 
-                 } else {
 
-                     $result[] = $value;
 
-                 }
 
-             }
 
-         }
 
-         return $result;
 
-     }
 
-     /**
 
-      * 对数据排序,并返回排序后的数据组成的新 Collection 实例
 
-      * @access public
 
-      * @param  callable|null $callback 回调函数
 
-      * @return static
 
-      */
 
-     public function sort(callable $callback = null)
 
-     {
 
-         $items    = $this->items;
 
-         $callback = $callback ?: function ($a, $b) {
 
-             return $a == $b ? 0 : (($a < $b) ? -1 : 1);
 
-         };
 
-         uasort($items, $callback);
 
-         return new static($items);
 
-     }
 
-     /**
 
-      * 将数据打乱后组成新的 Collection 实例
 
-      * @access public
 
-      * @return static
 
-      */
 
-     public function shuffle()
 
-     {
 
-         $items = $this->items;
 
-         shuffle($items);
 
-         return new static($items);
 
-     }
 
-     /**
 
-      * 截取数据并返回新的 Collection 实例
 
-      * @access public
 
-      * @param  int  $offset       起始位置
 
-      * @param  int  $length       截取长度
 
-      * @param  bool $preserveKeys 是否保持原先的键名
 
-      * @return static
 
-      */
 
-     public function slice($offset, $length = null, $preserveKeys = false)
 
-     {
 
-         return new static(array_slice($this->items, $offset, $length, $preserveKeys));
 
-     }
 
-     /**
 
-      * 指定的键是否存在
 
-      * @access public
 
-      * @param  mixed $offset 键名
 
-      * @return bool
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function offsetExists($offset)
 
-     {
 
-         return array_key_exists($offset, $this->items);
 
-     }
 
-     /**
 
-      * 获取指定键对应的值
 
-      * @access public
 
-      * @param  mixed $offset 键名
 
-      * @return mixed
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function offsetGet($offset)
 
-     {
 
-         return $this->items[$offset];
 
-     }
 
-     /**
 
-      * 设置键值
 
-      * @access public
 
-      * @param  mixed $offset 键名
 
-      * @param  mixed $value  值
 
-      * @return void
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function offsetSet($offset, $value)
 
-     {
 
-         if (is_null($offset)) {
 
-             $this->items[] = $value;
 
-         } else {
 
-             $this->items[$offset] = $value;
 
-         }
 
-     }
 
-     /**
 
-      * 删除指定键值
 
-      * @access public
 
-      * @param  mixed $offset 键名
 
-      * @return void
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function offsetUnset($offset)
 
-     {
 
-         unset($this->items[$offset]);
 
-     }
 
-     /**
 
-      * 统计数据的个数
 
-      * @access public
 
-      * @return int
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function count()
 
-     {
 
-         return count($this->items);
 
-     }
 
-     /**
 
-      * 获取数据的迭代器
 
-      * @access public
 
-      * @return ArrayIterator
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function getIterator()
 
-     {
 
-         return new ArrayIterator($this->items);
 
-     }
 
-     /**
 
-      * 将数据反序列化成数组
 
-      * @access public
 
-      * @return array
 
-      */
 
-     #[\ReturnTypeWillChange]
 
-     public function jsonSerialize()
 
-     {
 
-         return $this->toArray();
 
-     }
 
-     /**
 
-      * 转换当前数据集为 JSON 字符串
 
-      * @access public
 
-      * @param  integer $options json 参数
 
-      * @return string
 
-      */
 
-     public function toJson($options = JSON_UNESCAPED_UNICODE)
 
-     {
 
-         return json_encode($this->toArray(), $options);
 
-     }
 
-     /**
 
-      * 将数据转换成字符串
 
-      * @access public
 
-      * @return string
 
-      */
 
-     public function __toString()
 
-     {
 
-         return $this->toJson();
 
-     }
 
-     /**
 
-      * 将数据转换成数组
 
-      * @access protected
 
-      * @param  mixed $items 数据
 
-      * @return array
 
-      */
 
-     protected function convertToArray($items)
 
-     {
 
-         return $items instanceof self ? $items->all() : (array) $items;
 
-     }
 
- }
 
 
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