Cron Study: WP 크론 API 동작을 위한 실험 플러그인.

cron-study.php

<?php
/**
 * Plugin Name: Cron Study
 * Description: WP 크론 API 동작을 위한 실험 플러그인.
 */

register_activation_hook( __FILE__, function () {
	if ( ! wp_next_scheduled( 'cron-study', [ 'time' => 'Next Thursday' ] ) ) {
		$time = new DateTime( 'now', wp_timezone() );
		$time->setTime(
			$time->format( 'H' ),
			intval( $time->format( 'i' ) ) + 1,
			0
		);

		wp_schedule_event(
			$time->getTimestamp(),
			'every-minute',
			'cron-study',
			[ 'time' => 'Next Thursday' ]
		);
	}
} );


add_filter( 'cron_schedules', function ( $schedules ) {
	$schedules['every-minute'] = [
		'interval' => MINUTE_IN_SECONDS,
		'display'  => 'Every Minute',
	];

	return $schedules;
} );


register_deactivation_hook( __FILE__, function () {
	if ( wp_next_scheduled( 'cron-study', [ 'time' => 'Next Thursday' ] ) ) {
		wp_clear_scheduled_hook( 'cron-study', [ 'time' => 'Next Thursday' ] );
	}
} );


add_action( 'cron-study', function () {
	$message = sprintf(
		'크론이 %s에 실행되었습니다. 인자: %s',
		wp_date( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ) ),
		preg_replace( "/[\r\n]+/", ' ', print_r( func_get_args(), 1 ) )
	);

	error_log( $message );
} );