php检测图片木马 -PHP-Tutorial-php.cn

php检测图片木马

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Freigeben： 2016-07-23 08:54:50

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实践php检测图片木马

/**
+------------------------------------------------------------------------------
* Upload 文件上传类
+------------------------------------------------------------------------------
* @package Upload
* @author nicegy
* @version $Id: Upload.class.php 2014-4-11 19:00:23 nicegy $
+------------------------------------------------------------------------------
*/
class Upload {
private static $image = null;
private static $status = 0;
private static $suffix = null;
private static $imageType = array('.jpg', '.bmp','.gif','.png');
private static $message = array(
'0' => '没有错误发生，文件上传成功。',
'1' => '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。',
'2' => '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。',
'3' => '文件只有部分被上传。',
'4' => '没有文件上传。',
'5' => '未能通过安全检查的文件。',
'6' => '找不到临时文件夹。',
'7' => '文件写入失败。',
'8' => '文件类型不支持',
'9' => '上传的临时文件丢失。',
);
//@ 开始执行文件上传
public static function start($feild = 'file') {
if (!empty($_FILES)) {
self::$status = $_FILES[$feild]['error'];
if (self::$status > 0)
return array('status' => self::$status, 'msg' => self::$message[self::$status]);
self::$image = $_FILES[$feild]['tmp_name'];
self::$suffix = strtolower(strrchr($_FILES[$feild]['name'], '.'));
return array('status' => self::_upload(), 'path' => self::$image, 'msg' => self::$message[self::$status]);
} else {
return array('status' => self::$status, 'msg' => self::$message[self::$status]);
}
}
//@ 私有上传开始
private static function _upload($path = './upload/') {
date_default_timezone_set('PRC');
$newFile = $path . date('Y/m/d/His') . rand(100, 999) . self::$suffix;
self::umkdir(dirname($newFile));
if (is_uploaded_file(self::$image) && move_uploaded_file(self::$image, $newFile)) {
self::$image = $newFile;
if (in_array(self::$suffix, self::$imageType))
return self::checkHex();
else
return self::$status = 0;
} else {
return self::$status = 9;
}
}
//@ 私有 16进制检测黑客
private static function checkHex() {
if (file_exists(self::$image)) {
$resource = fopen(self::$image, 'rb');
$fileSize = filesize(self::$image);
fseek($resource, 0);
if ($fileSize > 512) { // 取头和尾
$hexCode = bin2hex(fread($resource, 512));
fseek($resource, $fileSize - 512);
$hexCode .= bin2hex(fread($resource, 512));
} else { // 取全部
$hexCode = bin2hex(fread($resource, $fileSize));
}
fclose($resource);
/* 匹配16进制中的 */
/* 匹配16进制中的 */
/* 匹配16进制中的

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