GD and Image 函数
在线手册:中文 英文
PHP手册

image_type_to_mime_type

(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

说明

string image_type_to_mime_type ( int $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:

返回值常量
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()exif_thumbnail()


GD and Image 函数
在线手册:中文 英文
PHP手册
PHP手册 - N: 取得 getimagesize,exif_read_data,exif_thumbnail,exif_imagetype 所返回的图像类型的 MIME 类型

用户评论:

benshelock at gmail dot com (09-Mar-2009 07:08)

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 (11-Sep-2004 09:04)

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