How to Sets whether a remote client can abort the running of a script in PHP ?

In PHP, the ignore_user_abort() function can be used to set whether a remote client can abort the running of a script.

When ignore_user_abort() is called with a parameter of true, the script will continue to run even if the remote client disconnects. On the other hand, if it is called with a parameter of false (or no parameter at all), the script will be aborted if the remote client disconnects.

Here's an example of how to use ignore_user_abort():

// Set ignore_user_abort to true
ignore_user_abort(true);

// Do some long-running task
for ($i = 0; $i < 10; $i++) {
    sleep(1);
    echo "Task completed: $i seconds\n";
}

In this example, the ignore_user_abort() function is called with a parameter of true, which means that the script will continue to run even if the remote client disconnects. The script then performs a long-running task (in this case, a loop that sleeps for 1 second and outputs a message), which will continue to run even if the client disconnects.

Another way to achieve the same result is by setting the connection_aborted() function to true. This function returns true if the client has disconnected, and can be used to check whether the script should continue running. Here's an example:

// Do some long-running task
for ($i = 0; $i < 10; $i++) {
    sleep(1);
    echo "Task completed: $i seconds\n";

    // Check if the client has disconnected
    if (connection_aborted()) {
        break;
    }
}

In this example, the script performs the same long-running task as before, but checks whether the client has disconnected after each iteration of the loop. If the client has disconnected, the loop is broken and the script stops running.