


The difference between mb_convert_encoding and iconv in php_PHP tutorial
mb_convert_encoding This function is used to convert encoding. I used to not understand the concept of program coding, but now I seem to understand a little bit. However, English generally does not have encoding problems, only Chinese data will have this problem.
For example, when you use Zend Studio or Editplus to write a program, you use gbk encoding. If the data needs to be entered into the database, and the database encoding is utf8, then the data must be encoded and converted, otherwise it will be lost when entering the database. Become gibberish.
For the usage of mb_convert_encoding, please see the official website:
mb_convert_encoding — Convert character encoding
Report a bug Description
string mb_convert_encoding ( string $str , string $to_encoding [, mixed $from_encoding ] )
Converts the character encoding of string str to to_encoding from optionally from_encoding.
Report a bug parameter
str
The string being encoded.
to_encoding
The type of encoding that str is being converted to.
from_encoding
Is specified by character code names before conversion. It is either an array, or a comma separated enumerated list. If from_encoding is not specified, the internal encoding will be used.
See supported encodings.
Report a bug return value
The encoded string.
Report a bug example
Example #1 mb_convert_encoding() example
The code is as follows | Copy code | ||||||||||||||||
/* Auto detect encoding from JIS, eucjp-win, sjis-win, then convert str to UCS-2LE */ $str = mb_convert_encoding($str, "UCS-2LE", "JIS, eucjp-win, sjis-win");
/* "auto" is expanded to "ASCII,JIS,UTF-8,EUC-JP,SJIS" */ $str = mb_convert_encoding($str, "EUC-JP", "auto");
|
The code is as follows | Copy code |
$str='Script Home: http://www.bKjia.c0m'; echo mb_convert_encoding($str, "UTF-8"); //Encoding converted to utf-8 ?> |
The code is as follows | Copy code |
$str='Script Home: http://www.bKjia.c0m'; echo mb_convert_encoding($str, "UTF-8", "GBK"); //It is known that the original encoding is GBK, convert to utf-8 ?> |
The code is as follows | Copy code |
$str='Script Home: http://www.bKjia.c0m'; echo mb_convert_encoding($str, "UTF-8", "auto"); //Unknown original encoding, after automatic detection by auto, convert the encoding to utf-8 ?> |
Make a GBK To UTF-8
代码如下 | 复制代码 |
header("content-Type: text/html; charset=Utf-8"); echo mb_convert_encoding("???S我的友仔", "UTF-8", "GBK"); ?> |
Another GB2312 To Big5
代码如下 | 复制代码 |
header("content-Type: text/html; charset=big5"); echo mb_convert_encoding("你是我的朋友", "big5", "GB2312"); ?> |
However, to use the above function, you need to install and enable the mbstring extension library first.
Another function iconv in PHP is also used to convert string encoding, and its function is similar to the function above.
There are some detailed examples below:
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 remove the ; in front of extension=php_mbstring.dll in php.ini
mb_convert_encoding can specify multiple input encodings. It will automatically identify based on the content, but the execution efficiency is much worse than iconv;
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 suffixes: //TRANSLIT and //IGNORE, where //TRANSLIT will automatically convert characters that cannot be directly converted into one or more Approximate characters, //IGNORE will ignore characters that cannot be converted, and the default effect is to truncate from the first illegal character.
Returns the converted string or FALSE on failure.
Use:
It was found that iconv would make an error when converting the character "-" to gb2312. Without the ignore parameter, all strings following this character 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.
In general, use iconv. Only use the mb_convert_encoding function when you are unable to determine what the original encoding is, or when iconv cannot be displayed normally after conversion.
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.
The code is as follows
|
Copy code
|
||||
/* Auto detect encoding from JIS, eucjp- win, sjis-win, then convert str to UCS-2LE */
/* “auto” is expanded to “ASCII,JIS,UTF-8,EUC-JP,SJIS” */ $str = mb_convert_encoding($str, “EUC-JP”, “auto”);
|
The code is as follows | Copy code |
$content = iconv("GBK", " UTF-8//IGNORE″, $content); $content = mb_convert_encoding($content, “UTF-8″, “GBK”); In general, 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 |

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP remains important in modern web development, especially in content management and e-commerce platforms. 1) PHP has a rich ecosystem and strong framework support, such as Laravel and Symfony. 2) Performance optimization can be achieved through OPcache and Nginx. 3) PHP8.0 introduces JIT compiler to improve performance. 4) Cloud-native applications are deployed through Docker and Kubernetes to improve flexibility and scalability.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.

SublimeText3 Linux new version
SublimeText3 Linux latest version

Atom editor mac version download
The most popular open source editor

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 Mac version
God-level code editing software (SublimeText3)