| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467 | <?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 $offset 键名     * @return bool     */    public function offsetExists($offset)    {        return array_key_exists($offset, $this->items);    }    /**     * 获取指定键对应的值     * @access public     * @param  mixed $offset 键名     * @return mixed     */    public function offsetGet($offset)    {        return $this->items[$offset];    }    /**     * 设置键值     * @access public     * @param  mixed $offset 键名     * @param  mixed $value  值     * @return void     */    public function offsetSet($offset, $value)    {        if (is_null($offset)) {            $this->items[] = $value;        } else {            $this->items[$offset] = $value;        }    }    /**     * 删除指定键值     * @access public     * @param  mixed $offset 键名     * @return void     */    public function offsetUnset($offset)    {        unset($this->items[$offset]);    }    /**     * 统计数据的个数     * @access public     * @return int     */    public function count()    {        return count($this->items);    }    /**     * 获取数据的迭代器     * @access public     * @return ArrayIterator     */    public function getIterator()    {        return new ArrayIterator($this->items);    }    /**     * 将数据反序列化成数组     * @access public     * @return array     */    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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