If you are working with Images only and you need mime type (e.g. for headers), then this is a fast and reliable technique:
<?php
$file = 'path/to/image.jpg';
$image_mime = image_type_to_mime_type(exif_imagetype($file));
?>
It will output true image mime type even if you rename your image file.
image_type_to_mime_type
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
image_type_to_mime_type — Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype
Descrizione
The image_type_to_mime_type() function will determine the Mime-Type for an IMAGETYPE constant.
Elenco dei parametri
-
image_type -
One of the
IMAGETYPE_XXXconstants.
Valori restituiti
The returned values are as follows
image_type |
Returned value |
|---|---|
IMAGETYPE_GIF |
image/gif |
IMAGETYPE_JPEG |
image/jpeg |
IMAGETYPE_PNG |
image/png |
IMAGETYPE_SWF |
application/x-shockwave-flash |
IMAGETYPE_PSD |
image/psd |
IMAGETYPE_BMP |
image/bmp |
IMAGETYPE_TIFF_II (intel byte order) |
image/tiff |
IMAGETYPE_TIFF_MM (motorola byte order)
|
image/tiff |
IMAGETYPE_JPC |
application/octet-stream |
IMAGETYPE_JP2 |
image/jp2 |
IMAGETYPE_JPX |
application/octet-stream |
IMAGETYPE_JB2 |
application/octet-stream |
IMAGETYPE_SWC |
application/x-shockwave-flash |
IMAGETYPE_IFF |
image/iff |
IMAGETYPE_WBMP |
image/vnd.wap.wbmp |
IMAGETYPE_XBM |
image/xbm |
IMAGETYPE_ICO |
image/vnd.microsoft.icon |
IMAGETYPE_WEBP |
image/webp |
IMAGETYPE_AVIF |
image/avif |
Esempi
Example #1 image_type_to_mime_type() example
<?php
header("Content-type: " . image_type_to_mime_type(IMAGETYPE_PNG));
?>Note
Nota:
Questa funzione non necessita della libreria grafica GD.
Vedere anche:
- getimagesize() - Get the size of an image
- exif_imagetype() - Determine the type of an image
- exif_read_data() - Reads the EXIF headers from an image file
- exif_thumbnail() - Retrieve the embedded thumbnail of an image
add a note
User Contributed Notes 3 notes
slegersjohn at gmail dot com ¶
10 years ago
benshelock at gmail dot com ¶
15 years ago
I was looking to detect the format of images, Im not sure if this is the best way but it works for me.
<?php
$filename = 'http://static.php.net/www.php.net/images/php.gif';
$size = getimagesize($filename);
switch ($size['mime']) {
case "image/gif":
echo "Image is a gif";
break;
case "image/jpeg":
echo "Image is a jpeg";
break;
case "image/png":
echo "Image is a png";
break;
case "image/bmp":
echo "Image is a bmp";
break;
}
?>
kissrat at gmail dot com ¶
11 years ago
Map the image type enum to file extension:
$extensions = array(
IMAGETYPE_GIF => "gif",
IMAGETYPE_JPEG => "jpg",
IMAGETYPE_PNG => "png",
IMAGETYPE_SWF => "swf",
IMAGETYPE_PSD => "psd",
IMAGETYPE_BMP => "bmp",
IMAGETYPE_TIFF_II => "tiff",
IMAGETYPE_TIFF_MM => "tiff",
IMAGETYPE_JPC => "jpc",
IMAGETYPE_JP2 => "jp2",
IMAGETYPE_JPX => "jpx",
IMAGETYPE_JB2 => "jb2",
IMAGETYPE_SWC => "swc",
IMAGETYPE_IFF => "iff",
IMAGETYPE_WBMP => "wbmp",
IMAGETYPE_XBM => "xbm",
IMAGETYPE_ICO => "ico"
);
