我正在用PHP编写一个小脚本，如果发生某些天气情况，它将向我发送电子邮件或电报消息。我当时想每小时运行一次。
我的问题是，如果天气状况持续，我只需要收到一条通知。比方说，如果我收到下雪通知，那么在接下来的12小时内我不希望收到任何其他通知。
您将如何使用PHP解决此类问题？
<?php
//Run script every hour with server command
$weather_array = [];
//Assume you'd pull these values from some kind of weather API, hypen added to the end so we can explode the array later.
$weather = "snow";
$weather_save = "snow" . "-";
$timestamp = date("Y-m-d H:i:s");
$weather_array[0] = $weather_save;
$weather_array[1] = $timestamp;
$file = "weather.txt";
if (!file_exists($file)) {
file_put_contents($file, $weather_array);
}
$current_file = file_get_contents($file);
$weather_array2 = explode("-", $current_file);
$weather_new = $weather_array2[0];
$timestamp_new = $weather_array2[1];
if ($weather_new !== $weather_save) {
//Enter send email script here alerting new weather condition
//Delete weather.txt and recreate it with new $weather_array
unlink($file);
file_put_contents($file, $weather_array);
}
else {
//The timestamp in the file plus 12 hours
$future_time = date($timestamp_new, strtotime("+12 hours"));
//if now is greater than or equal to the future timestamp
if ($timestamp >= $future_time) {
//Enter send email script here alerting weather condition remaining the same for 12 hours
//Delete weather.txt and recreate it with the new $weather_array
unlink($file);
file_put_contents($file, $weather_array);
}
else {
//Do nothing, 12 hours hasn't passed yet.
}
}
?>