that too much encoding made the world too complicated and painful, so they sat together and shoot their heads to come up with a method: all the characters in the language are represented by the same character set, this is Unicode.
The original Unicode Standard UCS-2 uses two bytes to represent a single character, so you can often hear Unicode uses two bytes to represent a single character. But soon some people think that 256*256 is too small, or not
The following is an example of php reading and generating a unicodecsv file. I hope this example will help you. the following is an example of how php reads and generates unicode csv files. I hope this example will help you.
Script ec (2); script
======== First introduce BOM ====================
Bytes Encoding FormEf bb bf UTF-8Ff fe UTF-16 aka UCS-2, little endianFe ff UTF-16 aka UCS-2, big endian00 00 f
region you set. in Linux, MBCS cannot be used as the encoding. In Windows, you cannot see the MBCS characters, because Microsoft uses ANSI to scare people in order to make them more foreign. In the Save As dialog box of notepad, the encoding ANSI is MBCS. At the same time, GBK is used in the default region settings of Simplified Chinese Windows.
1.3. Unicode
Later, some people began to think that too much encoding made the world too complicated and painful, so they sat together and shoot their
result range is 0x0000 to 0xFFFFF.
The high 10 bits of the result and the 0xd800 do the logic or operation, the lower 10 bits and the 0xdc00 do the logic or the operation.
Combining the two parts together is the UTF-16 encoding of the character value.
The UTF-8 encodes Unicode using one byte or two bytes or three bytes.0xxxxxxx, using a byte to represent a Unicode code point that can represent 128 characters.110xxxxx 10xxxxxx, which represents a Unicode code point using two bytes a
This article mainly introduces the python natural language encoding and conversion module codecs. codecs is specially used for encoding and conversion. its interface can be used to expand to other code conversions, if you need it, you can refer to python's support for multi-language processing. it can process any character encoded in the current situation. here, I will take a deeper look at python's handling of multiple different languages.
One thing to note is that when python needs to perform
is not specified, the internal encoding would be used.
See supported encodings.
Report a bug return valueThe encoded string.
Report a bug Example
Example #1 mb_convert_encoding () Example
copy code
"!--? php/* Convert Internal CHARACTE R Encoding to SJIS */ $str = mb_convert_encoding ($str, "SJIS"); /* Convert EUC-JP to UTF-7 */ $str = mb_convert_encoding ($str, "UTF-7", "EUC-JP"); /* Auto detect encoding from JIS, Eucjp-win, Sjis-win, then convert str to
UTF-32 stores each character in 4 bytes to ensure that the UCS is fully represented. However, the number of characters in the UCS does not need to be represented by 32 bits at all, UTF-32 greatly wasted space. In addition, because of the combination of characters, the fixed length is not as fast as expected to locate characters, anyway, is super bad.UTF-16 maps the UCS
Charset
Describe
Us-ascii
7-bit ASCII character, also known as the basic Latin block of the iso646-us, Unicode character set
Iso-8859-1
ISO Latin alphabet, also known as iso-latin-1
UTF-8
8-bit UCS conversion format
Utf-16be
16-bit UCS conversion format, Big Endian (lowest address holds high byte) byte order
--------------------
Write your own encryption algorithm. The principle is very simple, that is, to convert the string according to certain rules, that is, to encrypt the string, and then convert the converted string in reverse order to restore it.
------ Solution --------------------
1. JS delays loading and stores the source address in the original attribute of img.
2,
PHP code
[User: root Time: 11: 14: 10 Path:/home/liangdong/php] $ php md5.php login [User: root Time: 11: 14: 13 Path: /
character encoding . For example, the Unicode character "A" is also encoded, UTF-8 character encoding to get the byte stream is 0x41, and UTF-16 (big-endian mode) is the 0x00 0x41.Common Unicode encodingUcs-2/utf-16What do we do if we want to implement encoding schemes for BMP characters in the Unicode character set? Since there are 216 = 65,536 character codes on the BMP level, we only need two bytes to fully represent all of the characters.For example, the Unicode character code for "Medium"
Coding problems that are often encountered under LinuxIf you need to operate files under Windows in Linux, you may often encounter problems with file encoding conversions. The default file format in Windows is GBK (gb2312), and Linux is generally UTF-8.To view the encoding methodMethod One: File filenameMethod Two: eNCA commandMethod Three: The file encoding can be viewed directly in vim: Set fileencodingIf you just want to see other encoded files or if you want to solve the problem of viewing f
Various Java string encoding and conversion
Import java. Io. unsupportedencodingexception;
/*** Encode the conversion string*/Public class changecharset {/** 7-bit ASCII characters, also known as the basic Latin block of the ISO646-US and Unicode Character Set */Public static final string us_ascii = "US-ASCII ";
/** ISO Latin alphabet No.1, also known as ISO-LATIN-1 */Public static final string iso_8859_1 = "ISO-8859-1 ";
/** Convert 8-bit UCS
Hebrew encoding. It represents another symbol in Russian encoding. However, in all these encoding methods, 0-represents the same symbol, but the difference is only the 128-255.
As for Asian countries, more characters are used, and about 0.1 million Chinese characters are used. A single byte can only represent 256 types of symbols. It must be expressed by multiple bytes. For example, the common encoding method for simplified Chinese is gb2312, which uses two bytes to represent a Chinese charac
The escape () function can encode a string so that the string can be read on all computers. Syntax: escape (string) parameter: string required. description: the string to be escaped or encoded.
The escape () function can encode a string so that the string can be read on all computers.
Syntax:Escape (string)Parameters:String required,Description:The string to be escaped or encoded.
Return value:A copy of the encoded string. Some characters are replaced with hexadecimal escape sequences.
Func
Supports Text Extraction from almost all software versions, such as office, PDF, mail, and compressed files, as well as text extraction from attachments in emails, compressed files, and embedded files..
Dmctextfilter is a generic library product developed and developed by Beijing hongyingfeng software Co., Ltd. This product can completely remove special control information from data of various document formats or inserted OLE objects, and quickly extract plain text data information. This allows
Dmctextfilter v4.2 is a generic library product developed and developed by Beijing hongyingfeng software Co., Ltd. This product can completely remove special control information from data of various document formats or inserted OLE objects, and quickly extract plain text data information. This allows you to centrally manage, edit, retrieve, and browse various document data resources. This product adopts the advanced multi-language, multi-platform, multi-thread design concept, supports multiple l
, it can theoretically represent a maximum of 256x256 = 65536 characters.
The issue of Chinese encoding needs to be discussed in a specific article. This note does not cover this issue. It is only pointed out that although multiple bytes are used to represent a symbol, the Chinese character encoding of the GB class has nothing to do with the Unicode and UTF-8 of the subsequent text.
3. Unicode
Unicode character set (UCS), the International Standard
of the Unicode Character Set
ISO-8859-1
ISO Latin Alphabet No. 1, a.k..ISO-LATIN-1
UTF-8
Eight-bit UCS Transformation Format
UTF-16BE
Sixteen-bit UCS Transformation format, big-Endian byte order
UTF-16LE
Sixteen-bit UCS Transformation format, little-Endian byte order
UTF-16
Sixteen-bit
I. Unicode Introduction
Unicode can be encoded using any of the following character encoding schemes:
UTF-8
UTF-16
UTF-32
A Unicode encoded file has a flag, as shown in the following code:
Unicode file header IDByte-order mark DescriptionEf bb bf UTF-8Ff fe UTF-16 aka UCS-2, little endianFe ff UTF-16 aka UCS-2, big endian00 00 FF Fe UTF-32 aka UCS
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