PHP iconv 跟 mb_convert_encoding 的区别

In the process of text processing, it is a common requirement to convert strings in different encoding formats. The iconv (InternationalizationConversion) function provided in the PHP language can meet this need very conveniently. This article will introduce the use of iconv function in detail from the following aspects: Definition of iconv function and introduction to common parameters Example demonstration: Convert GBK encoded string to UTF-8 encoded string Example demonstration: Convert UTF

The difference between insertignore, insert and replace instructions already exist or not. Example of insert error. Insertintonames(name,age)values("Xiao Ming", 23); insertignore ignores insertignoreintonames(name, age)values("Xiao Ming", 24); replace Replace and insert replaceintonames(name,age)values("Xiao Ming", 25); table requirements: PrimaryKey, or unique index result: the table id will be automatically incremented. Test code creates table

convert is not a software, but a file system modification command in Windows. Convert converts the file allocation table FAT and FAT32 volumes to the NTFS file system while leaving the existing files and folders intact. Its syntax is "convert [Volume] /fs:ntfs [/v] [/cvtarea:FileName] [/nosecurity] [/x]".

iconv-fencoding[-tencoding][inputfile]...[Function] Converts the contents of a given file from one encoding to another. [Description]-fencoding: Convert characters from encoding to encoding. -tencoding: Convert characters to encoding. -l: List the known set of encoded characters -ofile: Specify the output file -c: Ignore illegal characters in the output -s: Suppress warning messages, but not error messages --verbose: Display progress information -f and -t can The specified legal characters are listed in the command with the -l option. [Example]* List currently supported character encodings

How to deal with UnsupportedEncodingException in Java? In Java programming, you may encounter UnsupportedEncodingException. This exception is usually caused by incorrect encoding conversion or an unsupported encoding. In this article, we will introduce the causes of UnsupportedEncodingException exception and how to deal with it. What is UnsupportedE

1The basic unit of Unicode computer storage is the byte, which is composed of 8 bits. Since English only consists of 26 letters plus a number of symbols, English characters can be stored directly in bytes. But other languages ​​(such as Chinese, Japanese, Korean, etc.) have to use multiple bytes for encoding due to the large number of characters. With the spread of computer technology, non-Latin character encoding technology continues to develop, but there are still two major limitations: no multi-language support: the encoding scheme of one language cannot be used in another language and there is no unified standard: for example There are many encoding standards in Chinese such as GBK, GB2312, GB18030, etc. Since the encoding methods are not unified, developers need to convert back and forth between different encodings, and many errors will inevitably occur.

What are the similarities and differences between __str__ and __repr__? We all know the representation of strings. Python's built-in function repr() can express objects in the form of strings to facilitate our identification. This is the "string representation". repr() obtains the string representation of an object through the special method __repr__. If __repr__ is not implemented, when we print an instance of a vector to the console, the resulting string may be. >>>classExample:pass>>>print(str(Example()))>>>

Abstract Redis is an open source, high-performance key-value database that is widely used in various scenarios. In Redis, data type (type) and encoding (encoding) are very important concepts. This blog will introduce in detail the data types supported by Redis as well as the corresponding encoding methods and underlying implementation principles. To view the internal encoding of a Redis key, you can use the Redis command OBJECTENCODINGkey. Among them, key is the key name you want to query. For example, if you want to query the internal encoding of a key named mykey, you can execute the following command: 127.0.0.1:6379>objectencodin