search
HomeBackend DevelopmentPHP Tutorialphp character encoding conversion

php character encoding conversion

Mar 29, 2018 pm 12:46 PM
phpcodingConvert

This article mainly introduces the method of PHP character encoding conversion. The steps of the method are also relatively detailed. I hope it can help you.

iconv — Convert string to requested character encoding(PHP 4 >= 4.0.5, PHP 5)

mb_convert_encoding — Convert character encoding(PHP 4 >= 4.0.6, PHP 5 )

Usage:
string mb_convert_encoding (string str, string to_encoding [, mixed from_encoding] )
You need to enable the mbstring extension library first, and set in php.ini; extension=php_mbstring.dll in front of ; Remove


string iconv (string in_charset, string out_charset, string str)
Note:
In addition to specifying the encoding to be converted to, the second parameter can also add two A suffix: //TRANSLIT and //IGNORE,
Among them:
//TRANSLIT will automatically convert characters that cannot be directly converted into one or more approximate characters,
//IGNORE will ignore characters that cannot be directly converted Characters to convert, and the default effect is to truncate from the first illegal character.
Returns the converted string or FALSE on failure.

Use:
1. It is found that iconv will make an error when converting the character "-" to gb2312. If there is no ignore parameter, all characters after this character None of the strings can be saved. No matter what, these

"-" cannot be converted successfully and cannot be output. In addition, mb_convert_encoding does not have this bug.
2. mb_convert_encoding can specify multiple input encodings. It will automatically identify according to the content, but the execution efficiency is much worse than iconv; such as: $str =

mb_convert_encoding($str ,"euc-jp","ASCII,JIS,EUC-JP,SJIS,UTF-8");The order of "ASCII,JIS,EUC-JP,SJIS,UTF-8" also has different effects

Difference
3. Under normal circumstances, iconv is used. Only when the original encoding cannot be determined, or the iconv conversion cannot be displayed normally, the mb_convert_encoding function

.
from_encoding is specified by character code name before conversion. it can be array or string - comma separated

enumerated list. If it is not specified, the internal encoding will be used.

$str = mb_convert_encoding($ str, "UCS-2LE", "JIS, eucjp-win, sjis-win");

$str = mb_convert_encoding($str, "EUC-JP', "auto");

Example:
$content = iconv("GBK", "UTF-8", $content);
$content = mb_convert_encoding($content, "UTF-8", "GBK");


Conclusion

1. mb_convert_encoding() This function will automatically identify the encoding based on the content, but the execution efficiency is worse than iconv;
2. Then there is a saying that iconv() will be abnormal when converting some characters. There is a saying on the Internet: it is found that iconv will make an error when converting the character "-" to gb2312. If there is no ignore parameter, all the characters after this character The string cannot be saved. No matter what, this "-" cannot be converted successfully and cannot be output. In addition, mb_convert_encoding does not have this bug.
3. mb_convert_encoding() is a PHP extension function and can only be used when the extension library is enabled; iconv It is a built-in function in PHP and can be used without opening an additional extension library.
4. Under normal circumstances, iconv is used. Only when the original encoding cannot be determined, or iconv cannot be displayed normally after conversion, use the mb_convert_encoding function

Related recommendations:

How to solve php encoding conversion garbled code

php array encoding conversion example

php encoding conversion analysis

The above is the detailed content of php character encoding conversion. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
The Continued Use of PHP: Reasons for Its EnduranceThe Continued Use of PHP: Reasons for Its EnduranceApr 19, 2025 am 12:23 AM

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python: Exploring Their Similarities and DifferencesPHP and Python: Exploring Their Similarities and DifferencesApr 19, 2025 am 12:21 AM

PHP and Python are both high-level programming languages ​​that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP and Python: Different Paradigms ExplainedPHP and Python: Different Paradigms ExplainedApr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python: A Deep Dive into Their HistoryPHP and Python: A Deep Dive into Their HistoryApr 18, 2025 am 12:25 AM

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

Choosing Between PHP and Python: A GuideChoosing Between PHP and Python: A GuideApr 18, 2025 am 12:24 AM

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP and Frameworks: Modernizing the LanguagePHP and Frameworks: Modernizing the LanguageApr 18, 2025 am 12:14 AM

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHP's Impact: Web Development and BeyondPHP's Impact: Web Development and BeyondApr 18, 2025 am 12:10 AM

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Atom editor mac version download

Atom editor mac version download

The most popular open source editor