PHP Filter 函数
PHP:指示支持该函数的最早的 PHP 版本。
filter_has_var() | 检查是否存在指定输入类型的变量。 | 5 |
filter_id() | 返回指定过滤器的 ID 号。 | 5 |
filter_input() | 从脚本外部获取输入,并进行过滤。 | 5 |
filter_input_array() | 从脚本外部获取多项输入,并进行过滤。 | 5 |
filter_list() | 返回包含所有得到支持的过滤器的一个数组。 | 5 |
filter_var_array() | 获取多项变量,并进行过滤。 | 5 |
filter_var() | 获取一个变量,并进行过滤。 | 5 |
PHP Filters
FILTER_CALLBACK | 调用用户自定义函数来过滤数据。 |
FILTER_SANITIZE_STRING | 去除标签,去除或编码特殊字符。 |
FILTER_SANITIZE_STRIPPED | "string" 过滤器的别名。 |
FILTER_SANITIZE_ENCODED | URL-encode 字符串,去除或编码特殊字符。 |
FILTER_SANITIZE_SPECIAL_CHARS | HTML 转义字符 '"& 以及 ASCII 值小于 32 的字符。 |
FILTER_SANITIZE_EMAIL | 删除所有字符,除了字母、数字以及 !#$%&'*+-/=?^_`{|}~@.[] |
FILTER_SANITIZE_URL | 删除所有字符,除了字母、数字以及 $-_.+!*'(),{}|\\^~[]`#%";/?:@&= |
FILTER_SANITIZE_NUMBER_INT | 删除所有字符,除了数字和 +- |
FILTER_SANITIZE_NUMBER_FLOAT | 删除所有字符,除了数字、+- 以及 .,eE。 |
FILTER_SANITIZE_MAGIC_QUOTES | 应用 addslashes()。 |
FILTER_UNSAFE_RAW | 不进行任何过滤,去除或编码特殊字符。 |
FILTER_VALIDATE_INT | 在指定的范围以整数验证值。 |
FILTER_VALIDATE_BOOLEAN | 如果是 "1", "true", "on" 以及 "yes",则返回 true,如果是 "0", "false", "off", "no" 以及 "",则返回 false。否则返回 NULL。 |
FILTER_VALIDATE_FLOAT | 以浮点数验证值。 |
FILTER_VALIDATE_REGEXP | 根据 regexp,兼容 Perl 的正则表达式来验证值。 |
FILTER_VALIDATE_URL | 把值作为 URL 来验证。 |
FILTER_VALIDATE_EMAIL | 把值作为 e-mail 来验证。 |
FILTER_VALIDATE_IP | 把值作为 IP 地址来验证。 |

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 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 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 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.

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 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.

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

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.


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