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October 22, 2015
PHP简单方法判断文件是否是图片 PHP best way to check if file is an image
(PHP 4 >= 4.3.0, PHP 5, PHP 7)
exif_imagetype — 判断一个图像的类型
值 | 常量 |
---|---|
1 | IMAGETYPE_GIF |
2 | IMAGETYPE_JPEG |
3 | IMAGETYPE_PNG |
4 | IMAGETYPE_SWF |
5 | IMAGETYPE_PSD |
6 | IMAGETYPE_BMP |
7 | IMAGETYPE_TIFF_II (Intel 字节顺序) |
8 | IMAGETYPE_TIFF_MM (Motorola 字节顺序) |
9 | IMAGETYPE_JPC |
10 | IMAGETYPE_JP2 |
11 | IMAGETYPE_JPX |
12 | IMAGETYPE_JB2 |
13 | IMAGETYPE_SWC |
14 | IMAGETYPE_IFF |
15 | IMAGETYPE_WBMP |
16 | IMAGETYPE_XBM |
<?php if (exif_imagetype("image.gif") != IMAGETYPE_GIF) { echo "The picture is not a gif"; } if (in_array(exif_imagetype("path/to/file"), array(IMAGETYPE_GIF , IMAGETYPE_JPEG ,IMAGETYPE_PNG , IMAGETYPE_BMP))) { echo "This is a picture "; } ?>
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