If you don't, either the browser will continue to treat your content as UTF-8, or you will see strange characters at the beginning of the page. If you need to remove the BOM, check whether your editor allows you to specify whether a UTF-8 signature is added or kept while you save the file. Such an editor provides a way of removing the signature by simply reading the file in then saving it out again.
Just choose the option without the BOM and save. One of the benefits of using a script is that you can remove the signature quickly, and from multiple files. In fact the script could be run automatically as part of your process. Note: You should check the process impact of removing the signature. It may be that some part of your content development process relies on the use of the signature to indicate that a file is in UTF So for most people this section will be academic.
Note that this is solely about the labeling of the content. The HTML5 specification currently disallows the use of any other, text-based in-document encoding declaration for pages using the UTF encoding. In effect, this means that the BOM is, itself, the declaration that you have to add.
The use of UTF for HTML content, however, is strongly discouraged and some implementations have removed support for it, so we haven't even mentioned it until now.
Crowder T. Crowder k gold badges silver badges bronze badges. You can also just strip it, which should let it parse without issue. DigiFriend DigiFriend 1, 4 4 silver badges 10 10 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
The Overflow Blog. Podcast Making Agile work for data science. I had found little information on this in a single place, with the exception of the table in Forensic Computing: A Practitioner's Guide by T.
Jenkinson Springer, ; that was my inspiration to start this list in See also Wikipedia's List of file signatures. Comments, additions, and queries can be sent to Gary Kessler at gck garykessler. This list is not exhaustive although I add new files as I find them or someone contributes signatures. Interpret the table as a one-way function: the magic number generally indicates the file type whereas the file type does not always have the given magic number.
If you want to know to what a particular file extension refers, check out some of these sites:. The File Signatures Web site searches a database based upon file extension or file signature. Tim Coakley's Filesig. Additional details on audio and video file formats can be found at the Sustainability of Digital Formats Planning for Library of Congress Collections site.
I thank them and apologize if I have missed anyone. I would like to give particular thanks to Danny Mares of Mares and Company , author of the MaresWare Suite primarily for the "subheaders" for many of the file types here , and the people at X-Ways Forensics for their permission to incorporate their lists of file signatures. Finally, Dr. Nicole Beebe from The University of Texas at San Antonio posted samples of more than 32 file types at the Digital Corpora, which I used for verification and additional signatures.
These files were used to develop the Sceadan File Type Classifier. The file samples can be downloaded from the Digital Corpora website. Permission to use the material here is extended to any of this page's visitors, as long as appropriate attribution is provided and the information is not altered in any way without express written permission of the author. Amiga Hunk executable file.
See the Unicode Home Page. Mbox table of contents file. NOTE: The next four bytes appear to be the number of e-mails in the associated mbox file. Firebird and Interbase database files, respectively. See IBPhoenix for more information. Get the Latest Bytes Updates. By using this site, you agree to our Privacy Policy and Terms of Use. Oct 12 '06 This discussion thread is closed Start new discussion Replies have been disabled for this discussion. PHP Three bytes prepended to data 2 posts views Thread by pbay last post: by.
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