cron スクリプトを手動で実行できます。
exec("cron script here");
必要に応じて、利用可能な cron スクリプトを取得できます (未テスト):
$crontab = file_get_contents("path/to/cron");
$cron_jobs = array_filter(explode(PHP_EOL, $crontab), function($cron_job) {
return $cron_job[0] !== "#"; // Remove comments.
});
$cron_jobs = array_map(function($cron_job) {
$fields = explode(" ", $cron_job);
$fields = array_splice($fields, 0, 5); // Get rid of timing information.
return implode(" ", $fields);
}, $cron_jobs);
$cron_script = $_GET["cron_script"];
if ($cron_script < sizeof($cron_jobs)) {
exec($cron_jobs[$cron_script]);
}