PHP implements receiving binary stream and converting it into picture

This article mainly introduces the method of receiving binary streams and converting them into pictures in PHP. It analyzes the related skills of PHP files, directories and graphics operations in the form of examples. Friends in need can refer to it

The details are as follows ：

Here, PHP is implemented to receive the binary stream and convert it into a picture. The picture class imageUpload.php used is as follows:

<?php
/**
 * 图片类
* @version 1.0
*
* PHP默认只识别application/x-www.form-urlencoded标准的数据类型。
* 因此，对型如text/xml 或者 soap 或者 application/octet-stream 之类的内容无法解析，如果用$_POST数组来接收就会失败！
* 故保留原型，交给$GLOBALS[&#39;HTTP_RAW_POST_DATA&#39;] 来接收。
* 另外还有一项 php://input 也可以实现此这个功能
* php://input 允许读取 POST 的原始数据。和 $HTTP_RAW_POST_DATA 比起来，它给内存带来的压力较小，并且不需要任何特殊的 php.ini 设置。php://input和 $HTTP_RAW_POST_DATA 不能用于 enctype="multipart/form-data"。
*/
class imageUpload {
  const ROOT_PATH = &#39;./&#39;;
  const FAIL_WRITE_DATA = &#39;Fail to write data&#39;;
  //没有数据流
  const NO_STREAM_DATA = &#39;The post data is empty&#39;;
  //图片类型不正确
  const NOT_CORRECT_TYPE = &#39;Not a correct image type&#39;;
  //不能创建文件
  const CAN_NOT_CREATE_FILE = &#39;Can not create file&#39;;
  //上传图片名称
  public $image_name;
  //图片保存名称
  public $save_name;
  //图片保存路径
  public $save_dir;
  //目录+图片完整路径
  public $save_fullpath;
  /**
   * 构造函数
   * @param String $save_name 保存图片名称
   * @param String $save_dir 保存路径名称
   */
  public function __construct($save_name, $save_dir) {
    //set_error_handler ( $this->error_handler () );
    //设置保存图片名称，若未设置，则随机产生一个唯一文件名
    $this->save_name = $save_name ? $save_name : md5 ( mt_rand (), uniqid () );
    //设置保存图片路径，若未设置，则使用年/月/日格式进行目录存储
    $this->save_dir = $save_dir ? self::ROOT_PATH .$save_dir : self::ROOT_PATH .date ( &#39;Y/m/d&#39; );
    //创建文件夹
    @$this->create_dir ( $this->save_dir );
    //设置目录+图片完整路径
    $this->save_fullpath = $this->save_dir . &#39;/&#39; . $this->save_name;
  }
  //兼容PHP4
  public function image($save_name) {
    $this->__construct ( $save_name );
  }
  public function stream2Image() {
    //二进制数据流
    $data = file_get_contents ( &#39;php://input&#39; ) ? file_get_contents ( &#39;php://input&#39; ) : gzuncompress ( $GLOBALS [&#39;HTTP_RAW_POST_DATA&#39;] );
    //数据流不为空，则进行保存操作
    if (! empty ( $data )) {
      //创建并写入数据流，然后保存文件
      if (@$fp = fopen ( $this->save_fullpath, &#39;w+&#39; )) {
        fwrite ( $fp, $data );
        fclose ( $fp );
        $baseurl = "http://" . $_SERVER ["SERVER_NAME"] . ":" . $_SERVER ["SERVER_PORT"] . dirname ( $_SERVER ["SCRIPT_NAME"] ) . &#39;/&#39; . $this->save_name;
        if ( $this->getimageInfo ( $baseurl )) {
          echo $baseurl;
        } else {
          echo ( self::NOT_CORRECT_TYPE );
        }
      } else {
      }
    } else {
      //没有接收到数据流
      echo ( self::NO_STREAM_DATA );
    }
  }
  /**
   * 创建文件夹
   * @param String $dirName 文件夹路径名
   */
  public function create_dir($dirName, $recursive = 1,$mode=0777) {
    ! is_dir ( $dirName ) && mkdir ( $dirName,$mode,$recursive );
  }
  /**
   * 获取图片信息，返回图片的宽、高、类型、大小、图片mine类型
   * @param String $imageName 图片名称
   */
  public function getimageInfo($imageName = &#39;&#39;) {
    $imageInfo = getimagesize ( $imageName );
    if ($imageInfo !== false) {
      $imageType = strtolower ( substr ( image_type_to_extension ( $imageInfo [2] ), 1 ) );
      $imageSize = filesize ( $imageInfo );
      return $info = array (&#39;width&#39; => $imageInfo [0], &#39;height&#39; => $imageInfo [1], &#39;type&#39; => $imageType, &#39;size&#39; => $imageSize, &#39;mine&#39; => $imageInfo [&#39;mine&#39;] );
    } else {
      //不是合法的图片
      return false;
    }
  }
  /*private function error_handler($a, $b) {
   echo $a, $b;
  }*/
}
?>

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