How to convert php data stream into pictures

How to convert PHP data flow into images: 1. Create a PHP sample file; 2. Define an image class through "class imageUpload {...}"; 3. Through "public function image($ save_name) {...}" method to create and write to the data stream; 4. Get image information through the "getimageInfo" method.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, Dell G3 computer.

php How to convert a data stream into a picture?

php receives a binary stream and converts it into a picture

php receives a binary stream and converts it into a picture, the picture class imageUpload.php is as follows:

<?php
/**
 * 图片类
* @author http://blog.csdn.net/haiqiao_2010
* @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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