RegExr-S

A 502 error may occur when starting the first time. Wait 1 minute to refresh the page. RegExr-S is a powerful online regular expression testing tool that supports dual engines such as JavaScript and PHP/PCRE. Providing real-time syntax highlighting, matching visualization, detailed reference documentation and undo redo functions, it is a complete solution for developers to learn and debug regular expressions. ###Core Features - ** Dual engine support **: JavaScript and PHP/PCRE regular engines - ** Real-time test **: Enter the matching results immediately - ** Syntax highlighting **: Colored annotated regular expression syntax - ** Match visualization **: Visualize matching text and capture groups - ** Undo/redo **: Support Ctrl/Cmd+Z/Y shortcut keys - ** Reference Document **: Built-in complete regular expression quick lookup table - ** Toolbox **: Provides a variety of utilities to assist in testing ##Basic usage tutorial ###Step 1: Write regular expressions Enter your pattern in the regular expression input box at the top: ** Example 1: Match email address ** ```regex /[\w.-]+@ [\w.-]+\.\ w+/g ``` ** Example 2: Matching mobile phone numbers ** ```regex /1[3-9]\d{9}/g ``` ** Example 3: Matching URLs ** ```regex /https?:\/\/ [^\s]+/gi ``` ###Step 2: Enter test text Enter what you want to test in the test text area: ``` Contact email: zhangsan@example.com Customer service email: support@company.com Mobile phone number: 13812345678 Website: www.example.com ``` ###Step 3: Check the matching results - ** Highlighting **: Matching text will be highlighted in different colors - ** Match statistics **: Display the number of matches found - ** Capture groups **: Display the content of each capture group