A problem that has never been solved during development is that the page uses UTF8 encoding, and the header and tail use the method of template inclusion files. As a result, there is an extra blank line of about 10px in the head and tail without any reason, and there is nothing.
The reason is that they are all encoded in utf8. When including files, the final binary stream contains multiple UTF8 BOM tags. IE cannot parse pages containing multiple UTF8 BOM tags normally and directly replaces them with the actual displayed carriage returns, which results in an Blank lines, but Firefox does not have this problem.
Therefore, if the template uses the inclusion method to contain multiple utf8 files and needs to be saved with ultraedit, just select utf8 without BOM format when saving as function.
In addition, if the Chinese page puts the title tag in front of <meta http-equiv=”content-type” content=”text/html; charset=UTF-8″ /> in the html head tag, the page will be blank.
So utf8 pages should use the standard order
<meta http-equiv=”content-type” content=”text/html; charset=UTF-8″ />
<meta http-equiv=”content-language” content=”zh-CN” />
<meta name=”robots” content=”index,follow” />
<meta name=”keywords” content=”” />
<meta name=”description” content=”” />
<meta name=”rating” content=”general” />
<meta name=”author” content=”” />
<meta name=”copyright” content=”” />
<meta name=”generator” content=”” />
<title></title>
BOM header: xEFxBBxBF. PHP4 and 5 still ignore BOM, so they are output directly before parsing.
There is a special description of this problem in the w3.org standard FAQ:
http://www.w3.org/International/questions/qa-utf8-bom
The details are as follows:
In the UCS encoding, there is a code called "ZERO WIDTH NO" -BREAK SPACE" character, its encoding is FEFF. FFFE is a character that does not exist in UCS, so it should not appear in actual transmission. The UCS specification recommends that we transmit the characters "ZERO WIDTH NO-BREAK SPACE" before transmitting the byte stream. In this way, if the receiver receives FEFF, it indicates that the byte stream is Big-Endian; if it receives FFFE, it indicates that the byte stream is Little-Endian. Therefore, the character "ZERO WIDTH NO-BREAK SPACE" is also called BOM.
UTF-8 does not require a BOM to indicate the byte order, but can use the BOM to indicate the encoding method. The UTF-8 encoding of the character "ZERO WIDTH NO-BREAK SPACE" is EF BB BF. So if the receiver receives a byte stream starting with EF BB BF, it knows that it is UTF-8 encoded.
Windows is an operating system that uses BOM to mark the encoding method of text files: WindowsXP Professional, default character set: Chinese
1) notepad: can automatically identify UTF-8 encoding format files without BOM, but cannot control when saving files. Whether to add BOM. If the file is saved, BOM will be added uniformly.
2) editplus: cannot automatically recognize UTF-8 encoding format files without BOM. When saving the file, select UTF-8 format and will not write BOM header in the file header.
3) UltraEdit: The most powerful function for character encoding. Can automatically identify UTF-8 files with BOM and without BOM (can be configured); when saving, you can choose whether to add BOM through configuration.
(Special note is that when saving a newly created file, you need to choose to save as UTF -8 no bom format)
Later I found that Notepad ++ also has better support for utf-8 bom, and I recommend everyone to use it.