I've been struggling with a regular expression in PHP that should be returning an array of matches, but for some reason, it's returning an empty array. I've double-checked the regular expression and it seems to be correct.
Here's some context: I'm trying to extract specific information from a string using preg_match_all function. The string is in a specific format and I want to extract certain patterns from it.
I've defined my regular expression using the appropriate syntax, and I have tested it using online regex testers and it successfully identifies the patterns I'm looking for. However, when I use the same regular expression in my PHP code, it returns an empty array instead of the expected matches.
I've made sure that the string I'm trying to match against is not empty and that it does contain the patterns I'm looking for. I also made sure that I'm passing the correct parameters to the preg_match_all function.
I'm not sure if there's something specific to PHP's regex implementation that I'm missing. I've used regular expressions in other programming languages before and they have worked fine, so I'm a bit confused as to why it's not working in PHP.
If anyone has any insights or suggestions on what might be causing the issue, I would greatly appreciate it. I'm open to any ideas or troubleshooting steps that might help me figure out why my regular expression is not returning the expected matches.
Thanks in advance for your help!