Why is the php script interrupted while parsing?

Question

PHP

There was a need to parse one site. There are 300 pages that need to be parsed in a certain way. Implemented through ajax which pulls this script, and so on 1 page every 3 seconds. parses. On one page returns an empty result.
Those. the script fails to execute. I manually ran the script with the required parameters and the browser says "Data not received". It takes about 30 seconds from the moment of launch. It seems that I checked all the restrictions, there are sufficient values ​​(for example, max_execution_time etc.)
I have no idea where to dig, any ideas?

Answer 1

See error log.

Answer 2

parse from console