PHP: preg_replace file path

Question

I'm stuggeling with this regular expression:

preg_replace('/\/[\s\S]+?_/', '/', $currentFile)

It changes this: /public_html/ftp/Products/1010_Air+Cooled+Condenser/productsheet_Rotary+Drum+Dryer+BR.pdf

To this: html/Air+Cooled+Condenser/Rotary+Drum+Dryer+BR.pdf

Expected result: /public_html/ftp/Products/Air+Cooled+Condenser/Rotary+Drum+Dryer+BR.pdf

"/productsheet_" could also be "/fish-cb_" or "/appeltaartenbakker_"

"/1010_" is always a number with this length.

Does it mean you do not want to match that pattern at the start of the string? Try (?!^)\/[^\/]+_. Or (?!^)\/[^_\/]+_ if you only need to remove the part after a / and before the first _ in that subpart. — Wiktor Stribiżew
– Wiktor Stribiżew, Commented Jan 10, 2018 at 10:04
@WiktorStribiżew could you explain what you just did there? It works! — Bart Ros
– Bart Ros, Commented Jan 10, 2018 at 10:29

Wiktor Stribiżew · Accepted Answer · 2018-01-10 10:32:00Z

2

I believe you are looking for

'~(?!^)/[^/]+_~'

See the regex demo. If you need to make it stop before the first _, add the underscore to the [...]: '~(?!^)/[^_/]+_~'.

Details

(?!^) - not at the start of the string
/ - a / char (no need to escape as I am using ~ as a regex delimiter char)
[^/]+ - 1 or more chars other than /
_ - a _ char.

PHP demo:

$str = '/public_html/ftp/Products/1010_Air+Cooled+Condenser/productsheet_Rotary+Drum+Dryer+BR.pdf';
$result = preg_replace('~(?!^)/[^/]+_~', '/', $str);
echo $result; // => /public_html/ftp/Products/Air+Cooled+Condenser/Rotary+Drum+Dryer+BR.pdf

answered Jan 10, 2018 at 10:32

Wiktor Stribiżew

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Comments

Thomas Smyth · Accepted Answer · 2018-01-10 10:40:24Z

2

Depending on how well formed those file paths are you could try:

preg_replace('/[0-9]{4}_(.+\/).+_/','\1',$currentFile)

Which I tested in php 7.0.3 and in vim with:

/public_html/ftp/Products/1010_Air+Cooled+Condenser/productsheet_Rotary+Drum+Dryer+BR.pdf
/public_html/ftp/Products/1020_Air+Cooled+Condenser/fish-cb_Rotary+Drum+Dryer+BR.pdf
/public_html/ftp/Products/1030_Air+Cooled+Condenser/appeltaartenbakker_Rotary+Drum+Dryer+BR.pdf

Using this command and very magic mode \v:

:%s/\v[0-9]{4}_(.+\/).+_/\1/g
/public_html/ftp/Products/Air+Cooled+Condenser/Rotary+Drum+Dryer+BR.pdf
/public_html/ftp/Products/Air+Cooled+Condenser/Rotary+Drum+Dryer+BR.pdf
/public_html/ftp/Products/Air+Cooled+Condenser/Rotary+Drum+Dryer+BR.pdf

edited Jan 10, 2018 at 10:40

answered Jan 10, 2018 at 10:15

Thomas Smyth

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2 Comments

Bart Ros Over a year ago

I meant that "/productsheet_" could be any string.

Thomas Smyth Over a year ago

Updated to match any string.

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