如何在特定时间后运行代码

Question

我试着根据一个小时来显示一些内容。这个小时来自DB作为string字段。如果当前时间匹配或传递来自DB的时间，则应该显示某个内容，否则将是默认内容

到目前为止我尝试过的是：

       $time    = strtotime($p_objetct->getHour());

      //we check if  this has already passed to 
      //retrieve corresponding content else we display default content
      if ($time >= date("h:i:sa")) {
            echo 'time to display new content !';
      }else{
            echo 'display content default';
      }

这段代码不能正常工作，因为如果我想在20:00显示新内容，那么当当前时间是08:00:00时，第一个条件是真的。

我也试过

$time      = strtotime(p_objetct->getHour());
$selection = floor((date('G',$time) / 2));
switch ($selection) {
case 0:
   echo 'time between 0-2!';
   break;
case 1:
   echo 'time between 2-4!';
   break;
case 2:
  echo 'time between 4-6!';
  break;
case 3:
  echo 'time between 6-8!';
  break;
case 4:
   echo 'time between 8-10!';
   break;
case 5:
   echo 'time between 10-12!';
   break;
case 6:
  echo 'time between 12-14!';
  break;
case 7:
  echo 'time between 14-16!';
  break;
case 8:
  echo 'time between 16-18!';
  break;
case 9:
  echo 'time between 18-20!';
  break;
case 10:
  echo 'time between 20-22!';
  break;
case 11:
  echo 'time between 22-24!';
  break;
}

但这不是一个好方法，因为我无法猜到在这种情况下，DB的时间将是..。

欢迎任何想法！

编辑:

我有两个内容(新的和默认的)。新内容应从DB开始显示到00:00:00，然后是默认内容。

Answer 1

如果您只从$p_objetct->getHour()方法获得24小时格式的小时，那么您可以简单地将其与date('H');进行比较。

如果你有精确的匹配，你可以使用：

<?php
$hourToCheck = $p_objetct->getHour();
$currentHour = date('H'); // As of PHP manual "H" returns the hour in 24h format

$contentToDisplay = "What ever you wanna display as default.";
if ($hourToCheck === $currentHour) {
    $contentToDisplay = "Your matching content.";
}

如果您需要它作为一个较低的时间，可以随意使用和更改这个片段：

<?php
$hourToCheck = $p_objetct->getHour();
$currentHour = date('H'); // As of PHP manual "H" returns the hour in 24h format

$contentToDisplay = "What ever you wanna display as default.";
if ($hourToCheck <= $currentHour) {
    $contentToDisplay = "Your matching content 1.";
}

Answer 2

您可以尝试根据时间设置一个具有名称的变量，将现有文件与该名称匹配，并使用php来要求它。如下所示：

<?php
    $time      = date('H',time());
    $name_of_content_to_require = false;
    switch ($time) {
    case 0:
       $name_of_content_to_require = '0-2';
       break;
    case 1:
       $name_of_content_to_require = '2-4';
       break;
    case 2:
      $name_of_content_to_require = '4-6';
      break;
    case 3:
      $name_of_content_to_require = '6-8';
      break;
    case 4:
       $name_of_content_to_require = '8-10';
       break;
    case 5:
       $name_of_content_to_require = '10-12';
       break;
    case 6:
      $name_of_content_to_require = '12-14';
      break;
    case 7:
      $name_of_content_to_require = '14-16';
      break;
    case 8:
      $name_of_content_to_require = '16-18';
      break;
    case 9:
      $name_of_content_to_require = '18-20';
      break;
    case 10:
      $name_of_content_to_require = '20-22';
      break;
    case 11:
      $name_of_content_to_require = '22-24';
      break;
    }
    if( $name_of_content_to_require ) {
      require_once __DIR__ . $name_of_content_to_require . '.php';
    } else {
      die('with some error, or throw an exception');
    }