Regular Expressions For Cleaning Up URL Lists - Mostly Find/Replace for text editors

Negative Look Behind

Find: (.*?)(?<!\.php)\n
Replace:

Remove everything that doesn't contain .php

^((?!\.png|\.jpg).)*$

select everything that doesn't contain .png or .jpg

Remove everything except the last directory.txt

Find: (.*?)([^/]+(?=/$|$))
Replace: $2

Remove Query String

Find: ([^?]+).*
Replace: $1

Select Everything But...

Find: ^(?:.(?<!pattern))*$
Replace: