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PHP的base64_decode及写入mysql前的转义

本帖最后由 dimply 于 2014-06-19 19:17:39 编辑 我看到这个函数解码后返回一个string。
现在我编码前是一个二进制文件流,从图像文件读取来的。如果用这个函数解码并赋值给一个变量,那么应该默认就是一个string变量了。string变量可以存储二进制文件流吗?如果不能,应该怎么做,才能正确解码呢?

另外一个问题是,解码后要将这个二进制流存入到mysql的一个longblob字段里面,我需要对哪些字符进行转义?PHP是不是有专门的函数来一次性实现这个转义的?

补充一下我所用的编码和解码方式:

编码部分(VC端)

char buffer[102400];  //BUF_SIZE大小自己定义<br />DWORD length;<br /><br />//照片图片<br />FILE * pFile = fopen("photo.bmp", "rb");<br />int img = fread(buffer, sizeof(char), 102400, pFile);//将文件二进制流读入到buffer中<br />fclose(pFile);<br /><br />CryptBinaryToString((const BYTE *)buffer,img,CRYPT_STRING_BASE64,NULL,&length);//获取存放编码后字串所需长度<br />ImgString = new TCHAR[length];//ImgString是要发送给PHP的字串,根据上面获取的长度,初始化该字串<br />length--;//减去最后字串结束符的位置<br />CryptBinaryToString((const BYTE *)buffer,img,CRYPT_STRING_BASE64,ImgString,&length);//向ImgString里面存放buffer的base64编码


解码并写入数据库部分(PHP+Mysql)

$face = addslashes(base64_decode(trim($_REQUEST['face'],"'")));<br />$query = "update index_base set face=$face where id=$bid";<br />$result = mysql_query($query);

------解决方案--------------------
在网上找个Base64编码的C源代码试试吧,很多啊。而且有很多在线编码的网页可以用来验证编码和解码是否正确:http://www1.tc711.com/tool/BASE64.htm
------解决方案--------------------
对应该是 需要的长度 + 1个结束位
每64个字符就有一个换行?是一个回车一个换行吧?
这是正常的传输格式(RFC 2045),目的是能快速校正传输中的漏码
到解码时删掉就行了
------解决方案--------------------
+ 变成 空格 是 URL 解码的功劳
$face = str_replace(' ', '+', $_REQUEST['face']);
换回来就是了

$img = base64_decode($face);
还原回图片数据了
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