Format file names using Regular Expression

Question

I am trying to rename some files using Regular Expression, but I am stuck in a specific format. I have video files in this format:

Yu.Yu.Hakusho Ep.001 - Death

I need to format using regex to:

Yu.Yu.Hakusho.S01E01 - Death

I tried using ([^ ]+)*.(\w{0,2}).([0-9]+)*.(.*.) to capture only what I need and format, as can be seen below:

$texto = "Yu.Yu.Hakusho Ep.001 - A Morte";
$regex = "/([^ ]+)*.(\w{0,2}).([0-9]+)(.*.)/";
preg_match($regex,$texto,$m);   

echo $m[1].".S01E".$m[3].$m[4];

And the way out is

Yu.Yu.Hakusho.S01E001 - Death

I’m not sure how to leave the sequence 001 only with the last two digits.

How do I do this substitution with regex? (I can’t use replace, I need to do it with ER only)

Note: I used php as an example, but I need to apply one regex, language independent, as can be seen here at this link: https://regex101.com/r/dC3aN4/1

Answer 1

I created another Pattern regex from scratch, because I found yours a little "disorganized."

Pattern: (.*?) .*?\d?(\d{2}).*?(\w.*)

Substituting: \1.S01E\2 - \3

If you prefer to use the same Pattern that I was already using, I made a modified version of it: ([^ ]+)* (\w{0,2})\.\d?(\d{1,2})*.(.*.)" The substitution remains the same.