(PHP 4 >= 4.3.0, PHP 5, PHP 7)
image_type_to_mime_type — Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype
$imagetype
   )The image_type_to_mime_type() function will determine the Mime-Type for an IMAGETYPE constant.
imagetypeOne of the IMAGETYPE_XXX constants.
The returned values are as follows
| imagetype | 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 | 
Example #1 image_type_to_mime_type() example
<?php
header("Content-type: " . image_type_to_mime_type(IMAGETYPE_PNG));
?>
Note:
This function does not require the GD image library.