(PHP 4 >= 4.3.0, PHP 5)
image_type_to_mime_type — 取得 getimagesize，exif_read_data，exif_thumbnail，exif_imagetype 所返回的图像类型的 MIME 类型
$imagetype
)image_type_to_mime_type() 函数可以判断一个 IMAGETYPE 常量的 MIME 类型。
Example #1 image_type_to_mime_type (file)
<?php
header("Content-type: " . image_type_to_mime_type(IMAGETYPE_PNG));
?>
返回值如下：
图像类型（imagetype） |
返回值 |
|---|---|
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 |
Note: 本函数不需要 GD 库。
参见 getimagesize()， exif_imagetype()， exif_read_data() 和 exif_thumbnail()。
benshelock at gmail dot com (2009-03-09 11:08:17)
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;
}
?>
aidan at php dot net (2004-09-11 01:04:02)
This functionality is now implemented in the PEAR package PHP_Compat.
More information about using this function without upgrading your version of PHP can be found on the below link:
http://pear.php.net/package/PHP_Compat