PHP obtains the exif information of the image through the exif_read_data function_PHP tutorial

php obtains the exif information of the image through the exif_read_data function

This article mainly introduces php to obtain the exif information of the image through the exif_read_data function. By default, PHP reads the image Exif information The module is not enabled, we need to enable this module first. Enabling the Exif module requires mbstring support. I won’t explain it in detail here. Let’s first look at the usage of the function

PHP gets the exif information of the image. PHP comes with an exif_read_data function that can be used to read the exif information of the image. The code comes from the PHP manual

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echo "test1.jpg: n"; $exif = exif_read_data('tests/test1.jpg', 'IFD0'); echo $exif===false ? "No header data found. n" : "Image contains headers n";   $exif = exif_read_data('tests/test2.jpg', 0, true); echo "test2.jpg: n"; foreach ($exif as $key => $section) { foreach ($section as $name => $val) { echo "$key.$name: $val n"; } } ?>

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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

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echo "test1.jpg:
n"; $exif = exif_read_data('tests/test1.jpg', 'IFD0'); echo $exif===false ? "No header data found.
n" : "Image contains headers
n"; $exif = exif_read_data('tests/test2.jpg', 0, true); echo "test2.jpg:
n"; foreach ($exif as $key => $section) { foreach ($section as $name => $val) { echo "$key.$name: $val
n"; } } ?>

The output results are as follows 　?

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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

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