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PHP implements method of receiving binary stream and converting it into image
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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