How can the echo command be delayed until after the Windows program started with exec() is closed?

To delay the echo command until after the Windows program started with exec() is closed, you can use the exec() function with the '&' symbol at the end of the command to run it in the background. This way, the PHP script will continue executing without waiting for the Windows program to finish. Then, you can use the sleep() function to pause the script for a specified amount of time before executing the echo command. 

<?php
// Execute the Windows program in the background
exec('start /B your_windows_program.exe');

// Pause the script for 5 seconds
sleep(5);

// Echo command to be executed after the Windows program is closed
echo 'Windows program has been closed.';
?>

Keywords

PHP exec() echo output buffering process control

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