How to get the mime type of a file through php

php Method to get file mime type

1. Use 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(&#39;1.jpg&#39;);
echo $mime_type; // image/jpeg
?>

But this method was abandoned in php5.3 and above, and the official recommendation is to use the fileinfo method instead.

2. Use Fileinfo method (official recommendation)

Using fileinfo requires installationphp_fileinfo Extension.

If installed, you can find it in the extension_dir directoryphp_fileinfo.dll(windows),fileinfo.so(linux)

Open php.ini, remove the ";" before extension=php_fileinfo.dll, and then restart apache.

<?php
$fi = new finfo(FILEINFO_MIME_TYPE);
$mime_type = $fi->file(&#39;1.jpg&#39;);
echo $mime_type; // image/jpeg
?>

#3. Use the image_type_to_mime_type method (can only handle image types)

Using the exif_imagetype method requires installationphp_exifExtension, and you need to install the php_mbstring extension

If it is installed, you can find it in the extension_dir directoryphp_exif.dll(windows), exif.so(linux)

Open php.ini, remove the "," before extension=php_mbstring.dll, extension=php_exif.dll, and then restart apache

<?php
$image = exif_imagetype(&#39;1.jpg&#39;);
$mime_type = image_type_to_mime_type($image);
echo $mime_type; // image/jpeg
?>

#Tips:If you use the suffix of the file name to judge, because the file suffix can be modified, it will not be judged by using the file suffix. precise.

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