为什么我的正则表达式在PHP中工作而不是JavaScript？

Question

I have a regex created by myself that I am currently running in PHP. Although when I merge it over to JavaScript, it refuses to work. I have also tried it in Python and it works perfectly fine.

Regex:

@[[](.[^]]+)[]][()](\d+)[)]

Testing in PHP, and working

Testing in JavaScript, and not working

Answer 1

JavaScript doesn't automatically escape your ] .

This will help you get a visual idea:

PCRE:

JS:

Python:

So to fix this, you need to escape the brackets

@[[](.[^\]]+)[\]][()](\d+)[)]
//      ^     ^  

The best way to write this regex is to minimize the use of character classes:

@\[(.[^\]]+)\][()](\d+)\)

That's why it's good practice to escape this stuff instead of relying on quirks of the flavor.

I generated these images through regex101 .