PHP connection_aborted() Function
 Complete PHP Misc Reference
Definition and Usage
The connection_aborted() function checks whether the client has disconnected.
This function returns 1 if the connection has been aborted, otherwise it
returns 0.
Syntax
Example
Create a function (check_abort()) that writes a log message if a client
aborts the script:
<?php
function check_abort()
{
if (connection_aborted())
error_log ("Script $GLOBALS[SCRIPT_NAME]" .
"$GLOBALS[SERVER_NAME] was aborted by the user.");
}
//some script to be executed here
// Call the check_abort function when the script ends
register_shutdown_function("check_abort");
?>
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Complete PHP Misc Reference
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