how-to-dispatch-pcntl-signals-in-php.md

How to dispatch PCNTL signals in PHP?

// plain

Dispatching PCNTL signals in PHP is a way to handle signals sent to a process. It can be used to catch and handle signals sent to the script, such as SIGTERM or SIGINT.

Example code

// Setup signal handler
declare(ticks = 1);
pcntl_signal(SIGTERM, "signal_handler");

// Signal handler function
function signal_handler($signal) {
    switch($signal) {
        case SIGTERM:
            // Do something
            break;
    }
}

Output example

None

Code explanation

• declare(ticks = 1): This tells PHP to check for any signals every time it executes a statement.
• pcntl_signal(SIGTERM, "signal_handler"): This registers the signal handler function for the SIGTERM signal.
• switch($signal): This checks which signal was sent to the script.
• case SIGTERM:: This is the code that will be executed when the SIGTERM signal is sent.

Helpful links

• PHP PCNTL Manual

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