


PHP implements method of receiving binary stream and converting it into image
本文实例讲述了PHP实现接收二进制流转换成图片的方法。分享给大家供大家参考,具体如下:
这里实现php 接收二进制流转换成图片,所使用的图片类imageUpload.php如下:
<?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['HTTP_RAW_POST_DATA'] 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 = './'; const FAIL_WRITE_DATA = 'Fail to write data'; //没有数据流 const NO_STREAM_DATA = 'The post data is empty'; //图片类型不正确 const NOT_CORRECT_TYPE = 'Not a correct image type'; //不能创建文件 const CAN_NOT_CREATE_FILE = 'Can not create file'; //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 ( 'Y/m/d' ); //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 . '/' . $this->save_name; } //兼容PHP4 public function image($save_name) { $this->__construct ( $save_name ); } public function stream2Image() { //二进制数据流 $data = file_get_contents ( 'php://input' ) ? file_get_contents ( 'php://input' ) : gzuncompress ( $GLOBALS ['HTTP_RAW_POST_DATA'] ); //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, 'w+' )) { fwrite ( $fp, $data ); fclose ( $fp ); $baseurl = "http://" . $_SERVER ["SERVER_NAME"] . ":" . $_SERVER ["SERVER_PORT"] . dirname ( $_SERVER ["SCRIPT_NAME"] ) . '/' . $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 = '') { $imageInfo = getimagesize ( $imageName ); if ($imageInfo !== false) { $imageType = strtolower ( substr ( image_type_to_extension ( $imageInfo [2] ), 1 ) ); $imageSize = filesize ( $imageInfo ); return $info = array ('width' => $imageInfo [0], 'height' => $imageInfo [1], 'type' => $imageType, 'size' => $imageSize, 'mine' => $imageInfo ['mine'] ); } else { //不是合法的图片 return false; } } /*private function error_handler($a, $b) { echo $a, $b; }*/ } ?>
希望本文所述对大家PHP程序设计有所帮助。
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