PHP maintains a connection status bitfield with 3 bits:
- • 0 - NORMAL
- • 1 - ABORTED
- • 2 - TIMEOUT
By default a PHP script is terminated when the connection to the client
is broken and the ABORTED bit is turned on. This can be changed using the
ignore_user_abort() function. The TIMEOUT bit is
set when the script timelimit is exceed. This timelimit can be set using
set_time_limit().
<?php
set_time_limit(0);
ignore_user_abort(true);
/* code which will always run to completion */
?>
You can call connection_status() to check on the status
of a connection.
<?php
ignore_user_abort(true);
echo "some output";
if(connection_status()==0) {
// Code that only runs when the connection is still alive
} else {
// Code that only runs on an abort
}
?>
You can also register a function which will be called at the end of
the script no matter how the script was terminated.
<?php
function foo() {
if(connection_status() & 1)
error_log("Connection Aborted",0);
if(connection_status() & 2)
error_log("Connection Timed Out",0);
if(!connection_status())
error_log("Normal Exit",0);
}
register_shutdown_function('foo');
?>
