My first PHP script
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下一篇 2008-08-06 16:03:57
/ 个人分类：PHP
今天有个机会要写一段php脚本，需求如下：
Provide a URL link for HTTP request for the latest File (actual file name) generated by the application and stored on our server.
a. this link looks like below,
http://[ip address]:[port]/filename.bin?
b. can accept user's HTTP request
c. can return the latest files to user
-- read the file number from an existing file [say fileCur.dat];This file contains the latest file number
generated by the application
-- get the latest file which is suffixed with the latest file number
刚拿到需求有点蒙，不知道该用什么语言写，偶是编程菜鸟。去网上查了一圈，定了用php,不过.bin的link还不知道如何用php来实现，所以暂改了需求定为：http://[ip address]:[port]/filename.php?
代码先贴下，偶是一步步的网上查的再结合实际情况加工的，也许看了会觉得有点熟悉，呵呵。
<?php
//$_SERVER['scrīpt_FILENAME'] returns the absolute path of the scrīpt stored on the sever, however it contains some strings that I don't need, so do a search and replace here to meet my requiremnt.$file_dir = str_replace("filename.php","bin files/",$_SERVER['scrīpt_FILENAME']);
$file_CurFileNum =$file_dir.'CurFile.dat';
// Get the latest file number
$CurFileNum=GetLatestFileNumber($file_CurFileNum);
// Download latest AGPSData file
Filedw('AGPSData');
//Function: File Download
Function Filedw($FileType)
{
global $CurFileNum,$file_dir;
$file_name=$FileType.'_'.$CurFileNum.'.bin';
header("Content-type: application/octet-stream");
header('Content-length: '.filesize($file));
// display as filename.bin instead of the real file name when downloding on the client header('Content-disposition: attachment; filename=filename.bin');
readfile($file_dir.$file_name,50000);
}
//Function: Check if file exists
function CheckFileExists($File)
{
if (is_readable($File) == false)
{ die($File.' file does not exist.');}
else
{ echo $File.'file exists';}
}
// Function: Retrieve the latest file number.
function GetLatestFileNumber($file)
{
$fso = fopen($file, 'r');
$LatestFileNumber = fread($fso, filesize($file));
fclose($fso);
$LatestFileNumber=trim($LatestFileNumber);
return $LatestFileNumber;
}
?>
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