An implementation of the WHATWG MIME Sniffing specification

0.2.1 2021-03-07 03:58 UTC

This package is auto-updated.

Last update: 2023-03-07 08:05:48 UTC


This library aims to be a complete implementation of the WHATWG Mime Sniffing specification. Presently it only implements MIME type parsing (in other words, MIME sniffing itself is not implemented), but it will be expanded in due course.



A MIME type string may be parsed into a structured MimeType instance as follows:

$mimeType = \MensBeam\Mime\MimeType::parse("text/HTML; charSet=UTF-8");
echo $mimeType->type;              // prints "text"
echo $mimeType->subtype;           // prints "html"
echo $mimeType->essence;           // prints "text/html"
echo $mimeType->params['charset']; // prints "UTF-8"


Once parsed, a MimeType instance can be serialized to produce a normalized text representation:

$typeString = 'TeXt/HTML;  CHARset="UTF\-8"; charset=iso-8859-1; unset='; 
$mimeType = \MensBeam\Mime\MimeType::parse($typeString);
echo (string) $mimeType; // prints "text/html;charset=UTF-8"

MIME type groups

The MIME Sniffing specification defines a series of MIME type groups; these are exposed via the boolean properties isArchive, isAudioVideo, isFont, isHtml, isImage, isJavascript, isJson, isScriptable, isXml, and isZipBased. For example:

$mimeType = \MensBeam\Mime\MimeType::parse("image/svg+xml");
var_export($mimeType->isImage);      // prints "true"
var_export($mimeType->isXml);        // prints "true"
var_export($mimeType->isScriptable); // prints "true"
var_export($mimeType->isArchive);    // prints "false"