[pmwiki-users] Page with many lines goes blank

Petko Yotov 5ko at 5ko.fr
Wed Oct 13 02:23:30 PDT 2021

On 13/10/2021 09:43, Johan Bengtsson wrote:
> On Tue, 12 Oct 2021, Petko Yotov wrote:
>>  @ini_set('pcre.backtrack_limit', 10000000); # 10 Million
> This helped, it is working now! So it hits some kind of limit in PHP?

Yes. This is a PHP limit on how far to look forward, and loop back, when 
searching for matches of regular expressions. PmWiki uses regular 
expressions in the markup rules.

You may want to split the very long page into several pages, or the very 
long markup block into separate sections/blocks for example with a 
single line containing [==] every few hundred lines, or you can increase 
the PHP limits.

Added to PmWiki/Troubleshooting.


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