ConFoo 2025

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(int $image_type): string

image_type_to_mime_type() 函数将确定 IMAGETYPE 常量的 MIME 类型。

参数

image_type

IMAGETYPE_* 常量之一。

返回值

返回值如下:

返回值常量
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

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用户贡献的备注 1 note

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13
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.
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