I restarted my server yesterday and started running into strange behaviour with my regular expresions. All of a sudden, ones that I was running against an html document started returning
null. I was dumbfounded. But what I realized was my
php.ini file got reset to an earlier version with a very low value for the property
It was being set to
1000, despite the PHP default of
1000000. I simply had to increase it.
Worth noting, as mentioned in a comment on the configuration defaults page is that the actual number of calls may be limited to much fewer based on how PCRE handles character encoding itself.
I've tested this quite high, and my server seemed to be able to handle it quite well.