php 多文件上傳
用PHP上傳多個文件，需要對許多可能的錯誤檢查。此腳本允許上載有多少領域設置將在HTML表格中顯示的最大允許上傳文件大小。在php.ini文件中還包含一個名為ini選項中upload_max_filesize擁有2米的默認值，或2兆字節。此值也考慮到檢查時的錯誤。
這些錯誤是存儲在數組中的信息，並要求每個文件上傳信息的基礎上產生的任何錯誤或上載成功。的形式本身就是驗證，按照在DOCTYPE W3C驗證器。
<?php
/*
*
* @ Multiple File upload script.
*
* @ Can do any number of file uploads
* @ Just set the variables below and away you go
*
* @ Author: Kevin Waterson
*
* @copywrite 2008 PHPRO.ORG
*
*/
error_reporting(E_ALL);
/*** the upload directory ***/
$upload_dir= './uploads';
/*** numver of files to upload ***/
$num_uploads = 5;
/*** maximum filesize allowed in bytes ***/
$max_file_size = 51200;
/*** the maximum filesize from php.ini ***/
$ini_max = str_replace('M', '', ini_get('upload_max_filesize'));
$upload_max = $ini_max * 1024;
/*** a message for users ***/
$msg = 'Please select files for uploading';
/*** an array to hold messages ***/
$messages = array();
/*** check if a file has been submitted ***/
if(isset($_FILES['userfile']['tmp_name']))
{
/** loop through the array of files ***/
for($i=0; $i < count($_FILES['userfile']['tmp_name']);$i++)
{
// check if there is a file in the array
if(!is_uploaded_file($_FILES['userfile']['tmp_name'][$i]))
{
$messages[] = 'No file uploaded';
}
/*** check if the file is less then the max php.ini size ***/
elseif($_FILES['userfile']['size'][$i] > $upload_max)
{
$messages[] = "File size exceeds $upload_max php.ini limit";
}
// check the file is less than the maximum file size
elseif($_FILES['userfile']['size'][$i] > $max_file_size)
{
$messages[] = "File size exceeds $max_file_size limit";
}
else
{
// copy the file to the specified dir
if(@copy($_FILES['userfile']['tmp_name'][$i],$upload_dir.'/'.$_FILES['userfile']['name'][$i]))
{
/*** give praise and thanks to the php gods ***/
$messages[] = $_FILES['userfile']['name'][$i].' uploaded';
}
else
{
/*** an error message ***/
$messages[] = 'Uploading '.$_FILES['userfile']['name'][$i].' Failed';
}
}
}
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Multiple File Upload</title>
</head>
<body>
<h3><?php echo $msg; ?></h3>
<p>
<?php
if(sizeof($messages) != 0)
{
foreach($messages as $err)
{
echo $err.'<br />';
}
}
?>
</p>
<form enctype="multipart/form-data" action="<?php echo htmlentities($_SERVER['PHP_SELF']);?>" method="post">
<input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max_file_size; ?>" />
<?php
$num = 0;
while($num < $num_uploads)
{
echo '<div><input name="userfile[]" type="file" /></div>';
$num++;
}
?>
<input type="submit" value="Upload" />
</form>
</body>
</html>
