


html_entity_decode() converts HTML entities into character prototypes_PHP tutorial
PHP html_entity_decode() 适用于PHP 4.3.0+,将HTML 实体转成字符。
html_entity_decode(包含HTML 实体的字符串, 可选如何解码引号, 可选字符编码集)
如果字符串中包含无法被识别的字符集将被忽略,并由 ISO-8859-1 代替。您可以使用 PHP htmlentities() 将HTML标签、引号及ASCII字符集外的其他字符串转换成HTML 实体。
如何解码引号:
ENT_COMPAT - 默认。仅解码双引号。
ENT_QUOTES - 解码双引号和单引号。
ENT_NOQUOTES - 不解码任何引号。
字符编码集:
ISO-8859-1 - 默认。西欧。
ISO-8859-15 - 西欧 (增加 Euro 符号以及法语、芬兰语字母)。
UTF-8 - ASCII 兼容多字节 8 比特 Unicode
cp866 - DOS 专用 Cyrillic 字符集
cp1251 - Windows 专用 Cyrillic 字符集
cp1252 - Windows 专用西欧字符集
KOI8-R - 俄语
GB2312 - 简体中文,国家标准字符集
BIG5 - 繁体中文
BIG5-HKSCS - Big5 香港扩展
Shift_JIS - 日语
EUC-JP - 日语
PHP htmlspecialchars() 把 & ' " 转换成HTML 实体
PHP htmlspecialchars_decode() 把 & ' " HTML 实体反转成字符
PHP htmlentities() 把HTML标签字符转换为 HTML 实体
PHP html_entity_decode() 将所有HTML 实体转成字符原型
PHP html_entity_decode() 实例
虽然使用PHP htmlentities() 只能对HTML标签字符串进行HTML 实体化,但是您可以使用PHP html_entity_decode() 对所有HTML 实体化的字符进行转换成字符。
<?<span php </span><span function</span> showCode(<span $s</span>){<span return</span> <span str_replace</span>('&', '&', <span $s</span><span );} </span><span //</span><span 由于转成HTML实体后,输出依旧是原字符,所以这里对 & 替换成 & 可以输出源代码格式,如果不用这个替换,您可以通过查看输出的 $html 源代码,能够看到一样的结果。</span> <span $weigeti</span> = '-->"E.V-Get.com"<--'<span ; </span><span $html</span> = <span htmlentities</span>(<span $weigeti</span>,<span ENT_QUOTES); </span><span echo</span> showCode(<span $html</span><span ); </span><span //</span><span 输出【-->"E.V-Get.com"<--】</span> <span $entity</span> = <span html_entity_decode</span>(<span $html</span><span ); </span><span echo</span> showCode(<span $entity</span><span ); </span><span //</span><span 输出【-->"E.V-Get.com"<--】</span> <span $entity_noquotes</span>=<span html_entity_decode</span>(<span $html</span>,<span ENT_NOQUOTES); </span><span echo</span> showCode(<span $entity_noquotes</span><span ); </span><span //</span><span 输出【-->"E.V-Get.com"<--】</span> ?>
原文:http://e.v-get.com/w3c/PHP_html_entity_decode.html

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

PHP is not dead. 1) The PHP community actively solves performance and security issues, and PHP7.x improves performance. 2) PHP is suitable for modern web development and is widely used in large websites. 3) PHP is easy to learn and the server performs well, but the type system is not as strict as static languages. 4) PHP is still important in the fields of content management and e-commerce, and the ecosystem continues to evolve. 5) Optimize performance through OPcache and APC, and use OOP and design patterns to improve code quality.

PHP and Python have their own advantages and disadvantages, and the choice depends on the project requirements. 1) PHP is suitable for web development, easy to learn, rich community resources, but the syntax is not modern enough, and performance and security need to be paid attention to. 2) Python is suitable for data science and machine learning, with concise syntax and easy to learn, but there are bottlenecks in execution speed and memory management.

PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.


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