php通过exif_read_data函数获取图片的exif信息_PHP教程

php通过exif_read_data函数获取图片的exif信息

2020-09-25 15:38PHP教程网 PHP教程

这篇文章主要介绍了php通过exif_read_data函数获取图片的exif信息，默认情况下，PHP读取图片Exif信息模块是不开启的，我们需要先开启这个模块。开启Exif模块需要mbstring支持，这里就不详细说明了，我们来先看下函数的用法

php获取图片的exif信息，php自带一个exif_read_data函数可以用来读取图片的exif信息，代码来自php手册

				?

									<?php

									echo "test1.jpg:<br />\n";

									$exif = exif_read_data('tests/test1.jpg', 'IFD0');

									echo $exif===false ? "No header data found.<br />\n" : "Image contains headers<br />\n";

									$exif = exif_read_data('tests/test2.jpg', 0, true);

									echo "test2.jpg:<br />\n";

									foreach ($exif as $key => $section) {

									  foreach ($section as $name => $val) {

									    echo "$key.$name: $val<br />\n";

									  }

									}

									?>

输出结果如下

				?

									test1.jpg:

									No header data found.

									test2.jpg:

									FILE.FileName: test2.jpg

									FILE.FileDateTime: 1017666176

									FILE.FileSize: 1240

									FILE.FileType: 2

									FILE.SectionsFound: ANY_TAG, IFD0, THUMBNAIL, COMMENT

									COMPUTED.html: width="1" height="1"

									COMPUTED.Height: 1

									COMPUTED.Width: 1

									COMPUTED.IsColor: 1

									COMPUTED.ByteOrderMotorola: 1

									COMPUTED.UserComment: Exif test image.

									COMPUTED.UserCommentEncoding: ASCII

									COMPUTED.Copyright: Photo (c) M.Boerger, Edited by M.Boerger.

									COMPUTED.Copyright.Photographer: Photo (c) M.Boerger

									COMPUTED.Copyright.Editor: Edited by M.Boerger.

									IFD0.Copyright: Photo (c) M.Boerger

									IFD0.UserComment: ASCII

									THUMBNAIL.JPEGInterchangeFormat: 134

									THUMBNAIL.JPEGInterchangeFormatLength: 523

									COMMENT.0: Comment #1.

									COMMENT.1: Comment #2.

									COMMENT.2: Comment #3end

									THUMBNAIL.JPEGInterchangeFormat: 134

									THUMBNAIL.Thumbnail.Height: 1

									THUMBNAIL.Thumbnail.Height: 1