Script fails and redirects to main?

Question

PHP

In general, I encountered such a problem.
I am uploading a large .csv file, about 300 MB, among other things, this file contains a link to an image that needs to be uploaded to the server, and then update the data in the database.
During execution, the script performs a maximum of 100 iterations and redirects to the main page.
Please tell me what is causing this and how it can be avoided.

Answer 1

max_execution_time
memory_limit
Maybe because of these directives?

Answer 2

As they say: miracles do not happen - look for a mistake.
Look in the fire bug to see how the redirect happens, if it happens at all. I suggest looking in your code for "Location:" and put exit there with debug_prit_backtrace();
As one of the possible situations, some kind of fatal error/exception occurs and the script runs the error_handler/exception_handler/shutdown_function where the redirect happens.

Answer 3

Try to pull out a smaller number of records from the file (~ 30). If everything is done, then see habrahabr.ru/qa/17458/#answer_71933
If it does not help, then you need to look at the code.

Answer 4

Maybe the web server got tired of waiting and decided to redirect to the main one due to a timeout? Or did some very smart service not like the fact that something is taking a very long time and it killed the process?
Is there anything interesting in the web server logs?