image_type_to_mime_type
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
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
image_type_to_mime_type() 函数将确定 IMAGETYPE 常量的 MIME 类型。
返回值
返回值如下:
image_type |
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 (小端字节顺序) |
image/tiff |
IMAGETYPE_TIFF_MM (大端字节顺序)
|
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 |
示例
示例 #1 image_type_to_mime_type() 示例
<?php
header("Content-type: " . image_type_to_mime_type(IMAGETYPE_PNG));
?>
注释
注意:
此函数不需要 GD 图象库。
参见
- getimagesize() - 取得图像大小
- exif_imagetype() - 判断一个图像的类型
- exif_read_data() - 从一个图片文件中读取 EXIF 头信息
- exif_thumbnail() - 检索图像的嵌入式缩略图
+添加备注
用户贡献的备注 1 note
slegersjohn at gmail dot com ¶
10 years ago
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.
备份地址:http://www.lvesu.com/blog/php/function.image-type-to-mime-type.php