使用preg_replace在正则表达式中使用特殊字符的问题

Question

i have problem with regexp which is trying to find if phrase I search is within a <hx> tag or not

this is the example: https://regex101.com/r/xAlJJc/3

as you can see there's exactly 1 match in example, this is fine

the problem is that the moment you add a dot, comma or other character to this <h1>test string</h1> regexp is going crazy and show 2 matches

does anyone knows how to make sure that this: https://regex101.com/r/xAlJJc/4

will not find any matches for "test string"?

Answer 1

In my case the solution was to use this regex:

(Test)(?![^>]*?[^<]*?<\/a>)(?![^>]*?[^<]*?<\/button>)(?![^>]*?[^<]*?<\/h[1-6]>)

thank you for your efforts guys :)