php文件上传及错误代码总结

if($_FILES['myfile']['error'] > 0) { //判断文件是否可以成功上传到服务器，0表示上传成功
echo 'Error: ';

switch ( $_FILES['myfile']['error'] ) {
case UPLOAD_ERR_OK:
$response = 'There is no error, the file uploaded with success.';
break;
case UPLOAD_ERR_INI_SIZE:
$response = 'The uploaded file exceeds the upload_max_filesize directive in php.ini.';
break;
case UPLOAD_ERR_FORM_SIZE:
$response = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form.';
break;
case UPLOAD_ERR_PARTIAL:
$response = 'The uploaded file was only partially uploaded.';
break;
case UPLOAD_ERR_NO_FILE:
$response = 'No file was uploaded.';
break;
case UPLOAD_ERR_NO_TMP_DIR:
$response = 'Missing a temporary folder. Introduced in PHP 4.3.10 and PHP 5.0.3.';
break;
case UPLOAD_ERR_CANT_WRITE:
$response = 'Failed to write file to disk. Introduced in PHP 5.1.0.';
break;
case UPLOAD_ERR_EXTENSION:
$response = 'File upload stopped by extension. Introduced in PHP 5.2.0.';
break;
default:
$response = 'Unknown error';
break;
}
echo $response;


exit; //如果$_FILES['myfile']['error']大于0都是有错误，输出错误信息并退出程序
}

//获取上传文件的MIME类型中的主类型和子类型
list($maintype,$subtype)=explode("/",$_FILES['myfile']['type']);

if ($maintype=="text") { //通过主类型限制不能上传文本文件，例如.txt .html .php等文件文件

echo '问题: 不能上传文本文件。';
exit; //如果用户上传文本文件则退出程序

}

$upfile = './uploads/'.time().$_FILES['myfile']['name']; //定义上传后的位置和新文件名

if ( is_uploaded_file($_FILES['myfile']['tmp_name']) ) { //判断是否为上传文件

if ( !move_uploaded_file($_FILES['myfile']['tmp_name'], $upfile) ) { //从移动文件
echo '问题: 不能将文件移动到指定目录。';
exit;
}

}else{

echo '问题: 上传文件不是一个合法文件: ';
echo $_FILES['myfile']['name'];
exit;

}

echo '文件 : '.$upfile.' 上传成功, 大小为 : ' .$_FILES['myfile']['size'].'！
'; //如果文件上传成功则输出
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