There’s an excellent chart on wikipedia that lists common image types and their support by browser. The file types you listed (jpg, gif and png) seem to be the main formats supported by nearly every browser, albeit with certain caveats: Internet Explorer supports PNG images but is unable to correctly display images with gamma correction … Read more
FileInfo can do that for you: $encoded_string = “….”; $imgdata = base64_decode($encoded_string); $f = finfo_open(); $mime_type = finfo_buffer($f, $imgdata, FILEINFO_MIME_TYPE);
try these links Rich Text Format (RTF) Specification, version 1.6 How can I insert an image into a RichTextBox? Insert Image into rtf document you must change “picwgoa” to “picwgoal” and “pichgoa” to “pichgoal” string mpic = @”{\pict\pngblip\picw” + img.Width.ToString() + @”\pich” + img.Height.ToString() + @”\picwgoal” + width.ToString() + @”\pichgoal” + height.ToString() + @”\bin ” … Read more