javascript - 帮忙看下几个正则表达式代表的意思
以下几个正则表达式分别代表什么意思,请高手指教
<code>'/%0[0-8bcef]/' '/%1[0-9a-f]/' '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S'</code>
回复内容:
以下几个正则表达式分别代表什么意思,请高手指教
<code>'/%0[0-8bcef]/' '/%1[0-9a-f]/' '/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S'</code>
<code>/%0[0-8bcef]/ </code>
表示以字符串"%0"开头,后面再接一个字符,这个字符是属于0至8间的数字或bcef中的一个。
比如:"%00", "%06", "%0c"都符合,而"%09"不符合。
<code>'/%1[0-9a-f]/'</code>
和上一个类似
<code>'/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S' </code>
中括号内的内容表示下列字符中的任一个:0x00至0x08, 0x0B, 0x0C, 0x0E至0x1F, 0x7F。
[]后面的“+”表示上述的字符可以出现1次或多次。
JavaScript似乎只能设置g、i、m三个标识符,最后的/S或许是其它语言的,不太清楚。
推荐一个网站:https://regexper.com/
可以把你的正则表达式用图表示出来。

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

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

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

Hot Topics



PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
