determine file type

I recently used the following method to determine the file type: download the file and get the file stream-& amp; gt; stored on the hard disk-& amp; gt. However, this seems a lot more than that. can you determine the file type without saving the

An existing file has an unknown extension or is marked incorrectly. Suppose it is a normal, non-empty file, and can be used normally after the extension is corrected, how to determine which type of file it is?The file whose suffix is unknown or

Introduction When you use WebClient to download remote resources, you often encounter URLs like this: http://www.uushare.com/filedownload?user=icesee&id=2205188 http://www.guaishow.com/u/luanfujie/g9675/ We do not know whether this URL

When uploading files, you often need to determine the file type, such as examples and documents. The common practice is to directly determine the file suffix, in order to prevent various attacks, literary and art youths also use the file header

Generally we are in accordance with the file extension to determine the file type, but this is very unreliable, easily by modifying the extension to avoid, it is generally necessary to read the file information to identify, PHP extension provides

When using PHP for file upload and storage, many people will be the name of the file and saved to a writable folder, and then we in one of the mistakes is to use the extension of the upload file as the basis for judging the file type. This is

Php file type check: a function used to determine the file type based on the binary file header $ Files = array ('./test.jpg', 'test.png '); $ FileTypes = array ( 7790 => 'exe ', 7784 => 'midi ', 8

PHP uses the binary file header to quickly determine the file type reference: @ we generally determine the file type according to the file extension, but this is very unreliable and can be easily avoided by modifying the extension, generally, you

PHP uses the binary file header to quickly determine the file type reference: @ we generally determine the file type according to the file extension, but this is very unreliable and can be easily avoided by modifying the extension, generally, you

PHP uses the binary file header to quickly determine the file type reference: @ we generally determine the file type according to the file extension, but this is very unreliable and can be easily avoided by modifying the extension, generally, you