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Suppose I have a pretty lengthy PHP script taking exactly 60 seconds.
I connect to mysite.com/thatscript.php, I’m pretty sure I connected, then the script starts running. After 5 seconds I hit escape. Then I hit Ctrl+R, and wait another 5 seconds, then repeat 12 times.
What will happen and why?
/edit: I actually tested and it puts me to wait but I can’t distinguish whether Apache keeps me waiting, or another concurrent script, or whatever.
It depends on what PHP is doing.
Pressing esc will normally stop a browser loading the page.
If you lengthy script is also using a session, then all other request will wait until the previous script finished because of session locking.
Session locking related: How does session_start lock in PHP?
If you want to control how PHP handles the user stopping the request look at: http://php.net/manual/en/features.connection-handling.php