Detecting user abort or timeout

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I'm writing a download script in php. This script sends files using
echo in order to limit download speed. My script has to do something
after connection abort. Everything is ok unless client pauses

I'm using ignore_user_abort() and I'm checking connection_status()
while sending a file. When the user aborts connection, my loop breaks
and script finishes its job. But if the user pauses connection, the
script still sends a file!

I want my script to execute some commands after a break of the loop and
not to send file, if the user doesn't receive it! I don't know how to
implement that. Is it possible to do such script? Please help me. TIA

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