php 定义每天发生事件的简单示例

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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 四海网 www.q1010.com
 **/
// ==========================================================================
//    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, "r"); 
$theDate = fread($fh, 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.
 $fp = fopen('getdates.txt', w); 
 fwrite($fp, $dates); 
 fclose($fp);
// Write new user id number to file.
 $fp = fopen('getuser.txt', w); 
 fwrite($fp, $userNo); 
 fclose($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()); 
?>
/***   来自四海网（www.q1010.com）   ***/

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关键词：事件