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PHP Reader::readUInt16LE方法代码示例

本文整理汇总了PHP中Reader::readUInt16LE方法的典型用法代码示例。如果您正苦于以下问题:PHP Reader::readUInt16LE方法的具体用法?PHP Reader::readUInt16LE怎么用?PHP Reader::readUInt16LE使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Reader的用法示例。


在下文中一共展示了Reader::readUInt16LE方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的PHP代码示例。

示例1: getType

  /**
   * Returns the recognized MIME type/description of the given file. The type
   * is determined by the content using magic bytes characteristic for the
   * particular file type.
   *
   * If the type could not be found, the function returns the default value, or
   * <var>false</var>.
   *
   * @param string $filename The file path whose type to determine.
   * @param string $default  The default value.
   * @return string|false
   */
  public function getType($filename, $default = false)
  {
    $reader = new Reader($filename);

    $parentOffset = 0;
    foreach (preg_split("/^/m", $this->_magic) as $line) {
      $chunks = array();
      if (!preg_match("/^(?P<Dependant>>?)(?P<Byte>\d+)\s+(?P<MatchType>\S+)" .
                      "\s+(?P<MatchData>\S+)(?:\s+(?P<MIMEType>[a-z]+\/[a-z-" .
                      "0-9]+)?(?:\s+(?P<Description>.+))?)?$/", $line, $chunks))
        continue;
      
      if ($chunks["Dependant"]) {
        $reader->setOffset($parentOffset);
        $reader->skip($chunks["Byte"]);
      } else
        $reader->setOffset($parentOffset = $chunks["Byte"]);

      $matchType = strtolower($chunks["MatchType"]);
      $matchData = preg_replace
        (array("/\\\\ /", "/\\\\\\\\/", "/\\\\([0-7]{1,3})/e",
               "/\\\\x([0-9A-Fa-f]{1,2})/e", "/0x([0-9A-Fa-f]+)/e"),
         array(" ", "\\\\", "pack(\"H*\", base_convert(\"$1\", 8, 16));",
               "pack(\"H*\", \"$1\");", "hexdec(\"$1\");"),
         $chunks["MatchData"]);

      switch ($matchType) {
      case "byte":    // single character
        $data = $reader->readInt8();
        break;
      case "short":   // machine-order 16-bit integer
        $data = $reader->readInt16();
        break;
      case "long":    // machine-order 32-bit integer
        $data = $reader->readInt32();
        break;
      case "string":  // arbitrary-length string
        $data = $reader->readString8(strlen($matchData));
        break;
      case "date":    // long integer date (seconds since Unix epoch/1970)
        $data = $reader->readInt64BE();
        break;
      case "beshort": // big-endian 16-bit integer
        $data = $reader->readUInt16BE();
        break;
      case "belong":  // big-endian 32-bit integer
      case "bedate":  // big-endian 32-bit integer date
        $data = $reader->readUInt32BE();
        break;
      case "leshort": // little-endian 16-bit integer
        $data = $reader->readUInt16LE();
        break;
      case "lelong":  // little-endian 32-bit integer
      case "ledate":  // little-endian 32-bit integer date
        $data = $reader->readUInt32LE();
        break;
      default:
        $data = null;
        break;
      }

      if (strcmp($data, $matchData) == 0) {
        if (!empty($chunks["MIMEType"]))
          return $chunks["MIMEType"];
        if (!empty($chunks["Description"]))
          return $chunks["Description"];
      }
    }
    return $default;
  }
开发者ID:rtdean93,项目名称:therock,代码行数:82,代码来源:Magic.php


注:本文中的Reader::readUInt16LE方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。