Introduction to PHP zip compression package operation class

This article mainly introduces the PHP zip compression package operation class, and analyzes the PHP encapsulated zip file decompression, compression, recursive creation, reading and other related operations in the form of a complete example. Friends in need can refer to it

The example in this article describes the PHP zip compression package operation class. Share it with everyone for your reference, the details are as follows:

<?php
/**
 * Zip 文件包工具
 *
 * @author wengxianhu
 * @date 2013-08-05
 */
class ZipFolder
{
  protected $zip;
  protected $root;
  protected $ignored_names;
  public function __construct(){
    $this->zip = new ZipArchive;
  }
  /**
   * 解压zip文件到指定文件夹
   *
   * @access public
   * @param string $zipfile 压缩文件路径
   * @param string $path  压缩包解压到的目标路径
   * @return booleam 解压成功返回 true 否则返回 false
  */
  public function unzip ($zipfile, $path) {
    if ($this->zip->open($zipfile) === true) {
      $file_tmp = @fopen($zipfile, "rb");
      $bin = fread($file_tmp, 15); //只读15字节 各个不同文件类型，头信息不一样。
      fclose($file_tmp);
      /* 只针对zip的压缩包进行处理 */
      if (true === $this->getTypeList($bin))
      {
        $result = $this->zip->extractTo($path);
        $this->zip->close();
        return $result;
      }
      else
      {
        return false;
      }
    }
    return false;
  }
  /**
   * 创建压缩文件
   *
   * @access public
   * @param string $zipfile 将要生成的压缩文件路径
   * @param strng $folder 将要被压缩的文件夹路径
   * @param array $ignored 要忽略的文件列表
   * @return booleam 压缩包生成成功返回true 否则返回 false
  */
   public function zip ($zipfile, $folder, $ignored = null) {
    $this->ignored_names = is_array($ignored) ? $ignored : $ignored ? array($ignored) : array();
    if ($this->zip->open($zipfile, ZIPARCHIVE::CREATE) !== true) {
      throw new Exception("cannot open <$zipfile>\n");
    }
    $folder = substr($folder, -1) == &#39;/&#39; ? substr($folder, 0, strlen($folder)-1) : $folder;
    if(strstr($folder, &#39;/&#39;)) {
      $this->root = substr($folder, 0, strrpos($folder, &#39;/&#39;)+1);
      $folder = substr($folder, strrpos($folder, &#39;/&#39;)+1);
    }
    $this->createZip($folder);
    return $this->zip->close();
  }
  /**
   * 递归添加文件到压缩包
   *
   * @access private
   * @param string $folder 添加到压缩包的文件夹路径
   * @param string $parent 添加到压缩包的文件夹上级路径
   * @return void
  */
  private function createZip ($folder, $parent=null) {
    $full_path = $this->root . $parent . $folder;
    $zip_path = $parent . $folder;
    $this->zip->addEmptyDir($zip_path);
    $dir = new DirectoryIterator($full_path);
    foreach($dir as $file) {
      if(!$file->isDot()) {
        $filename = $file->getFilename();
        if(!in_array($filename, $this->ignored_names)) {
          if($file->isDir()) {
            $this->createZip($filename, $zip_path.&#39;/&#39;);
          }else {
            $this->zip->addFile($full_path.&#39;/&#39;.$filename, $zip_path.&#39;/&#39;.$filename);
          }
        }
      }
    }
  }
  /**
   * 读取压缩包文件与目录列表
   *
   * @access public
   * @param string $zipfile 压缩包文件
   * @return array 文件与目录列表
  */
  public function fileList($zipfile) {
    $file_dir_list = array();
    $file_list = array();
    if ($this->zip->open($zipfile) == true) {
      for ($i = 0; $i < $this->zip->numFiles; $i++) {
        $numfiles = $this->zip->getNameIndex($i);
        if (preg_match(&#39;/\/$/i&#39;, $numfiles))
        {
          $file_dir_list[] = $numfiles;
        }
        else
        {
          $file_list[] = $numfiles;
        }
      }
    }
    return array(&#39;files&#39;=>$file_list, &#39;dirs&#39;=>$file_dir_list);
  }
  /**
  * 得到文件头与文件类型映射表
  *
  * @author wengxianhu
  * @date 2013-08-10
  * @param $bin string 文件的二进制前一段字符
  * @return boolean
  */
  private function getTypeList ($bin)
  {
    $array = array(
      array("504B0304", "zip")
    );
    foreach ($array as $v)
    {
      $blen = strlen(pack("H*", $v[0])); //得到文件头标记字节数
      $tbin = substr($bin, 0, intval($blen)); ///需要比较文件头长度
      if(strtolower($v[0]) == strtolower(array_shift(unpack("H*", $tbin))))
      {
        return true;
      }
    }
    return false;
  }
}

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