php 定义每天发生事件的简单示例

对PHP定义每天发生的事件感兴趣的小伙伴，下面一起跟随编程之家 jb51.cc的小编两巴掌来看看吧！
我用这段代码每天自动给网站更换一副背景图片存入数据库

<?PHP
/**
 * PHP定义每天发生的事件
 *
 * @param 
 * @author 编程之家 jb51.cc jb51.cc
 **/
// ==========================================================================
//    Creates a file on the server with the day of the month.
//    If the day in the file doesn't match today's date,then do 'event' and update the file.
//
//    I use this to change the daily featured photos from a sql database.
// ==========================================================================
$dates = (idate(d));
$mydate = getdates.txt; 
$fh = fopen($mydate,r); 
$theDate = fread($fh,5); 
fclose($fh);
if ($dates <> $theDate){
// Doesn't match what's in the file,so must be a new day. Update file.
 $fp = fopen('getdates.txt',w); 
 fwrite($fp,$dates); 
 fclose($fp);
//  Do something.
}
// Else ignore.
?>
EXAMPLE USE:
					   $query = SELECT * FROM `photo_user` WHERE `idno` >'0'; 
					   $result = MysqL_query($query) or die(MysqL_error()); 
					   while($noticia = MysqL_fetch_array($result)) 
   {
								  // Get total records 
								  $total = $total +1; 
   }
// Get current selected user from file.
$myFile = getuser.txt; 
$fh = fopen($myFile,r); 
$theData = fread($fh,5); 
fclose($fh);
$userNo = $theData;
// Get today's date. 
$dates = (idate(d));
// See what date is in the file.
$mydate = getdates.txt; 
$fh = fopen($mydate,5); 
fclose($fh);
// Check to see if the dates match.
  if ($dates <> $theDate){ 
  $userNo = $userNo + 1;
   if ($userNo > $total){ 
   $userNo = 1; 
}
// Write today's date to file.
 $fp = fopen('getdates.txt',$dates); 
 fclose($fp);
// Write new user id number to file.
 $fp = fopen('getuser.txt',$userNo); 
 fclose($fp);
}
?>
<?PHP
// Each day a new user is selected. 
$query = SELECT * FROM `photo_user` WHERE `idno` =' . $userNo.'; 
$result = MysqL_query($query) or die(MysqL_error()); 
?>
/***   来自编程之家 jb51.cc（jb51.cc）   ***/