怎么用php写下载程序

很简单啊！

switch ($extension){

case "jpg":

case "jpeg": $ctype="image/jpeg"break

case "pdf": $ctype="application/磨森pdf"break

case "gif": $ctype="image/gif"break

case "png": $ctype="image/png"break

case "doc": $ctype="application/msword"break

case "zip": $ctype="application/zip"break

case "春游帆rar": $ctype="application/扒雹rar" break

default: $ctype="application/force-download"

}

header("Pragma: public")

header("Expires: 0")

header("Cache-Control: must-revalidate, post-check=0, pre-check=0")

header("Cache-Control: private",false)

header("Content-type: ". 这里是类型)

header("Content-Transfer-Encoding: binary")

header("Content-Length: ". filesize($path))

header('Content-Disposition: attachmentfilename="100.jpg" ')

readfile($path)

-----------------------------------------

你仔细看一下代码，然后就可以用了。。。

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写的比较简单,大概思路就是颂州这样喊橘,你自己再改改就ok了

a.php

<?php

rename("C:/my/path/file.txt","C:/my/path/file.doc")

?>

<a href="b.php">下载</a>

b.php

<?php

$file = "C:/my/path/file.doc"

header("Content-Disposition: attachmentfilename=file.doc"郑樱团)

header('Content-Transfer-Encoding: binary')

header("Content-Description: File Transfer")

header("Cache-Control: must-revalidate, post-check=0, pre-check=0")

header("Cache-Control: public")

header("Content-Type: $ctype")

header("Content-Length:".filesize($file))

flush()

readfile($file)

?>

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