PHP implementation to get file MIME type method _php tips

The example in this article describes how PHP gets file MIME types. Share to everyone for your reference. Specifically as follows:

1. Using the Mime_content_type method

String Mime_content_type (String $filename)

Returns the MIME content type for a file as determined by using information from the Magic.mime file.

<?php 
$mime _type = Mime_content_type (' 1.jpg '); 
echo $mime _type; Image/jpeg 
?>

However, this method was discarded above php5.3, and the official proposal was to use the FileInfo method instead.

2. Using the Fileinfo method (official recommendation)

You need to install Php_fileinfo extensions with FileInfo.
If installed can be found in the Extension_dir directory Php_fileinfo.dll (Windows), Fileinfo.so (Linux)
Open the php.ini, put the extension=php_fileinfo.dll before the ";" Remove, and then restart Apache.

<?php 
$fi = new Finfo (fileinfo_mime_type); 
$mime _type = $fi->file (' 1.jpg '); 
echo $mime _type; Image/jpeg 
?>

3. Using the Image_type_to_mime_type method (only the image type can be processed)

Use the Exif_imagetype method to install the php_exif extension and need to install the php_mbstring extension
If installed can be found in the Extension_dir directory Php_exif.dll (Windows), Exif.so (Linux)
Open the php.ini, put the Extension=php_mbstring.dll, Extension=php_exif.dll before the "," remove, and then restart Apache

<?php 
$image = Exif_imagetype (' 1.jpg '); 
$mime _type = Image_type_to_mime_type ($image); 
echo $mime _type; Image/jpeg 
?>

Tips: If you use the suffix of the file name to determine, because the file suffix can be modified, so use the file suffix to judge is inaccurate.

I hope this article will help you with your PHP program design.