php sigusr2

In PHP, SIGUSR2 is a signal that can be sent to a running process to trigger a specific action.

To handle the SIGUSR2 signal in PHP, you can use the pcntl_signal() function to register a signal handler function. Here's an example:

<?php

// Signal handler function
function handleSignal($signal)
{
    if ($signal === SIGUSR2) {
        // Handle SIGUSR2 signal
        echo "Received SIGUSR2 signal\n";
        // Perform specific action here
    }
}

// Register signal handler
pcntl_signal(SIGUSR2, 'handleSignal');

// Keep the script running
while (true) {
    // Do some work
    sleep(1);
}

In this example, the handleSignal() function is registered as the signal handler for SIGUSR2 using pcntl_signal(). When the process receives the SIGUSR2 signal, the handleSignal() function will be called and you can perform the desired action inside it.

Note that the pcntl extension needs to be enabled in your PHP configuration for this code to work.