PHP Functions about enlighterjs HOT 6 CLOSED

We setup a plain-jane, out of the box WordPress (version Version 4.9.8) with the TwentyFifteen theme (also out of the box) to use as an in-house Wiki for our weather model. The plugins we use are: Enlighter - Customizable Syntax Highlighter Version 3.8.1 | By Andi Dittrich | View details | News & Updates | EnlighterJS Website Page Security & Membership Allows admins to create user groups and restrict access to sections of the site by group. Version 1.5.15 | By Veraxus, Contexture | View details Tag Pages Add tags to Pages, just as you would do with Posts With this setup, I added a page. Call it "WeatherModel" On "Edit Page", in the Visual Mode, I type in a bunch of text, descriptions, blah, blah, blah and several uses of EnlighterJS code blocks. I click the "Code Insert", I get the Code Insert screen. I choose PHP for a language (have tried others as well) and paste in the following code: protected function start_output() { @ob_start(); @ob_implicit_flush(true); @ob_end_flush(); if($this->logit) { if(is_dir(PATH_CRON . 'logs/')) { $this->lfhandle = fopen(PATH_CRON . 'logs/' . $this->logfile, "w"); } } } I click "Ok" and I'm back on the Page Edit screen, and the EnlighterJS code box in there as expected, with the code in it. Now comes the problem. When I click "Update" to save my page, I get an Internal Server Error 500. If my code above is changed to: protected function start_output() { @ob_start(); @ob_implicit_flush(true); @ob_end_flush(); if($this->logit) { if(is_dir(PATH_CRON . 'logs/')) { $this->lfhandle = (php file open function)(PATH_CRON . 'logs/' . $this->logfile, "w"); } } } It saves without error. Same holds true with the PHP fwrite() function. If I just type in fopen() or fwrite() directly into the page (without EnlighterJS), there is no error. Hope this clarifies, and hope you can find a fix (or point me in the direction of a setting I should have changed or something). I rather like your plugin, but this might be a deal breaker for using it as this was just the first file to be documented, haven't even got to the complicated stuff yet. And thanks for the quick follow-up. Eric N

Interesting, it did indeed when I wrapped the function in <pre tags. What's your idea? I can change, or get changed, pretty much anything on the servers. Eric N

Thanks for the tip/direction, I'll look into it tomorrow. Closed the issue.