<?php
/**
 * function: 解压zip 格式的文件
 * author：friker
 * date:2015-15-14
 * reference：http://php.net/manual/zh/ref.zip.php
 * all rights reserved:wujiangwei123@126.com
 */
namespace app\common\components;
class Unzip{
    public function __construct(){
        //init code here...
        //header("content-type:text/html;charset=utf8");
    }


    function transcoding($fileName){
        $encoding = mb_detect_encoding($fileName,['UTF-8','GBK','BIG5','CP936']);
        if (DIRECTORY_SEPARATOR == '/'){    //linux
            $filename = iconv($encoding,'UTF-8',$fileName);
        }else{  //win
            $filename = iconv($encoding,'GBK',$fileName);
        }
        return $filename;
    }

    /**
     * 解压文件到指定目录
     *
     * @param  string  zip压缩文件的路径
     * @param  string  解压文件的目的路径
     * @param  boolean 是否以压缩文件的名字创建目标文件夹
     * @param  boolean 是否重写已经存在的文件
     *
     * @return boolean 返回成功 或失败
     */
    public function unzip($src_file, $dest_dir=false, $create_zip_name_dir=true, $overwrite=true){
        $fileList = array();
        $zip = new \ZipArchive;
        if ($zip->open($src_file) === TRUE) {
            if(!is_dir($dest_dir)) mkdir($dest_dir,0775,true);
            $docnum = $zip->numFiles;
            for($i = 0; $i < $docnum; $i++) {
                $statInfo = $zip->statIndex($i,\ZipArchive::FL_ENC_RAW);
                $filename = $this->transcoding($statInfo['name']);
                if($statInfo['crc'] == 0) {
                    //新建目录
                    if(!is_dir($dest_dir.'/'.substr($filename, 0,-1))) mkdir($dest_dir.'/'.substr($filename, 0,-1),0775,true);
                } else {
                    //拷贝文件
                    $fileList[] = $dest_dir.'/'.$filename;
                    @copy('zip://'.$src_file.'#'.$zip->getNameIndex($i), $dest_dir.'/'.$filename);
                }
            }
            $zip->close();
            return $fileList;
        }else{
            return false;
        }


    }

}


?>