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php上传文件(学习手记)

2009-03-24 09:06 561 查看

<?php

if(!empty($_FILES['file'])){

$file = $_FILES['file'];

if($file['error'] == UPLOAD_ERR_OK) {

if(isAllowedExtension($file['name'])) {

$name = $file['name'];

move_uploaded_file($file['tmp_name'],"upload/$name");

} else {

echo "Invalid file type".$file['name'];

}

} else die("Cannot upload");

}

function isAllowedExtension($fileName) {

$allowedExtensions = array("txt", "rtf", "doc");

return in_array(end(explode(".", $fileName)), $allowedExtensions);

}

?>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>

<HEAD>

<TITLE>File upload</TITLE>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<META NAME="Author" CONTENT="">

<META NAME="Keywords" CONTENT="">

<META NAME="Description" CONTENT="">

</HEAD>

<BODY>

<form name="form" method="POST" action="file_upload.php" enctype="multipart/form-data">

<input type="file" name="file" value="浏览"><br>

<input type="submit" name="btnUpload" value="上传">

</form>

</BODY>

</HTML>

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