search
HomeBackend DevelopmentPHP Tutorialemoji - php界iconv编码疑云!

输入 ?

<code>$str=json_encode($str);
$str=preg_replace('#(\\\ud[0-9a-f]{3}|\\\u2(6|7)[0-9a-f]{2})#ie','addslashes("\\1")',$str);
$str=json_decode($str);</code>

输出 \ud83d\udc38

那么 问题来了!!!

\ud83d\udc38 应该经过怎样的处理得到 🐸下面是我写的处理,但是不能输出我想要的数值,iconv("UCS-2","UTF-8",pack("H4","\\1")) 不起作用有时得到乱码。

<code>$str=preg_replace('#(\\\u[0-9a-f]{4}\\\u[0-9a-f]{4})#ie','iconv("UCS-2","UTF-8",pack("H4","\\1"))',$str);</code>

更改mysql的数据类型这个方案不能考虑


我完整的需求是这样的:

1、我输入一段话 例如 “一二三四五上山打老虎?”,我在保存进mysql时,需要将?转换成能写进mysql的编码,但是“一二三四五上山打老虎”这部分我需要原文存进数据库,这里就需要对输入的文本进行的正则过滤,然后将?转码,其他正常符号中英文不转码。

2、从数据库输出数据时,我用正则匹配出?的转码,将其输出为?和(🐸0x1f438),因为我在前端显示的静态的图片表示?,图片的来源于twitter的emoji库,图片的名称就是以1f438命名的。

完整的需求就是这样的。求大神指点下。

回复内容:

输入 ?

<code>$str=json_encode($str);
$str=preg_replace('#(\\\ud[0-9a-f]{3}|\\\u2(6|7)[0-9a-f]{2})#ie','addslashes("\\1")',$str);
$str=json_decode($str);</code>

输出 \ud83d\udc38

那么 问题来了!!!

\ud83d\udc38 应该经过怎样的处理得到 🐸下面是我写的处理,但是不能输出我想要的数值,iconv("UCS-2","UTF-8",pack("H4","\\1")) 不起作用有时得到乱码。

<code>$str=preg_replace('#(\\\u[0-9a-f]{4}\\\u[0-9a-f]{4})#ie','iconv("UCS-2","UTF-8",pack("H4","\\1"))',$str);</code>

更改mysql的数据类型这个方案不能考虑


我完整的需求是这样的:

1、我输入一段话 例如 “一二三四五上山打老虎?”,我在保存进mysql时,需要将?转换成能写进mysql的编码,但是“一二三四五上山打老虎”这部分我需要原文存进数据库,这里就需要对输入的文本进行的正则过滤,然后将?转码,其他正常符号中英文不转码。

2、从数据库输出数据时,我用正则匹配出?的转码,将其输出为?和(🐸0x1f438),因为我在前端显示的静态的图片表示?,图片的来源于twitter的emoji库,图片的名称就是以1f438命名的。

完整的需求就是这样的。求大神指点下。

? 的unicode 是 0x1f438,无法用两字节的 UCS-2 编码,用 UCS-4 可以。

大概是这么个思路:

<code><?php function uniord($u) {
    $k = mb_convert_encoding($u, 'UCS-4LE', 'UTF-8');
    $k1 = ord(substr($k, 0, 1));
    $k2 = ord(substr($k, 1, 1));
    $k3 = ord(substr($k, 2, 1));
    return $k3 * 256 * 256 + $k2 * 256 + $k1;
}
echo uniord('?');</code></code>

用mb,

iconv纯属扯淡

在线等 哼哼

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

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools