How to implement scheduled tasks in swoole

Method: 1. Use the "swoole_timer_after (time, function to be executed)" statement to execute the task after the specified time; 2. Use the "swoole_timer_tick (time, function to be executed, callback function)" statement to set an interval The clock timer executes tasks regularly.

The operating environment of this tutorial: Windows10 system, Swoole4 version, DELL G3 computer

How to implement scheduled tasks with swoole

swoole_timer_after

Execute the function after the specified time, which requires swoole-1.7.7 or above.

swoole_timer_after(int $after_time_ms, mixed $callback_function);

The swoole_timer_after function is a one-time timer that will be destroyed after execution is completed. This function is different from the sleep function provided by the PHP standard library. After is non-blocking. After the sleep call is made, the current process will be blocked and will not be able to handle new requests.

• $after_time_ms specifies the time in milliseconds

• $callback_function The function executed after the time expires must be callable. The callback function does not accept any parameters

• $after_time_ms must not exceed 86400000

Usage example

swoole_timer_after(1000, function(){
    echo "timeout\n";
});

swoole_timer_tick

Set an interval clock timer. Unlike the after timer, the tick timer will continue to trigger until it is cleared by calling swoole_timer_clear. Different from swoole_timer_add, the tick timer can have multiple timers with the same interval.

int swoole_timer_tick(int $ms, mixed $callback, mixed $param = null);

• $ms Specifies the time in milliseconds

• $callback_function The function executed after the time expires must be callable. The callback function does not accept any parameters

• $param callback parameters

• $ms The maximum value shall not exceed 86400000

Tick timer is available in version 1.7.14 or above

Tick timer will soon replace swoole_timer_add

Callback function

The callback function triggered by the timer accepts 2 parameters.

function onTimer(int $timer_id, mixed $params = null);

• $timer_id The ID of the timer, which can be used to swoole_timer_clear to clear this timer

• $params User parameters passed in by swoole_timer_tick

Usage examples

swoole_timer_tick(1000, function(){
    echo "timeout\n";
});

Recommended learning: swoole tutorial

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