Description:
------------
We have noticed that a test failed in our CI process. I guess its a BC in preg_match.

I am not 100% sure if it's related to php / ubuntu or ppa:ondrej/php but i guess a lot of people are affected by this. We could also reproduce this issue on different servers and containers.

you can reproduce the issue in with docker. The only difference here is the apt-get upgrade. foo.php is the example script.



docker run --rm -v "`pwd`/foo.php:/foo.php" -it ubuntu:latest \
   /bin/bash -c 'apt-get update && apt-get install software-properties-common -y && add-apt-repository ppa:ondrej/php && apt-get update && apt-get install -y php8.0-cli && php -v &&  php /foo.php'

# array(3) {
#   [0]=>
#   string(19) "/348182/XXX_348102/"
#   [1]=>
#   string(6) "348182"
#   [2]=>
#   string(6) "348102"
# }

echo "now with upgrade"

# array(0) {
# }

docker run --rm -v "`pwd`/foo.php:/foo.php" -it ubuntu:latest \
   /bin/bash -c 'apt-get update && apt-get install software-properties-common -y && add-apt-repository ppa:ondrej/php && apt-get update && apt-get upgrade && apt-get install -y php8.0-cli && php -v &&  php /foo.php'




Test script:
---------------
<?php

preg_match('/\/([\d]+)\/XXX_([\d]+)\//', '00/348/348182/XXX_348102/xxx', $matches); var_dump($matches);

Expected result:
----------------
array(3) {
  [0]=>
  string(19) "/348182/XXX_348102/"
  [1]=>
  string(6) "348182"
  [2]=>
  string(6) "348102"
}

Actual result:
--------------
array(0) {
}