The PHP JPEG Metadata Toolkit is a library of functions which allows manipulation of many types of metadata that reside in a JPEG image file. The metadata that can be accessed by this library include: Has been tested with over 450 popular digital cameras Provides access to lots of metadata for which php has no built in support Works with many files that have corrupted metadata. Customisable look of the HTML output via style sheets The toolkit requires PHP 4 or higher - Has been tested with PHP 4.3.7 and 4.3.8 Included with the PHP JPEG
Metadata Toolkit are several example scripts, which show how the library can be used to retrieve and store the metadata in a JPEG image file. Below are explanations of some of the commands used in the scripts. Go here for Function reference, live demo, and further informationIntroduction
Metadata Type NameContents EXIF, DCF & TIFF/EP - including makernotes
Contains Digital Camera Settings. Can contain a thumbnail.
XMP, RDF & Dublin Core, including multiple language support
Can contain Digital camera settings and text headings/captions.
Photoshop IRB & IPTC-NAA IIM
Contains Photoshop settings and can contain text headings/captions. Can contain a thumbnail.
Picture Info
Contains Digital Camera Settings for older cameras
JFIF & JFIF Extension
Contains limited info about the image and can contain a thumbnail
Intrinsic JPEG Values
Contains limited info configuration of the image
Other features
Requirements
Example Scripts
FileDemo Description Example.php
Displays detailed information about the metadata in a JPEG file.
TIFFExample.php
Displays detailed information about the metadata in a JPEG file.
Edit_File_Info_Example.php, Write_File_Info.php
Allows editing of metadata over the internet in exactly the same format as Photoshop"s "File Info" dialog box.
Click Here to Try It! - You might notice the Hindi characters, custom colours and that Photoshop CS wiped the EXIF makernote.
Version 1.12 [21/9/11] - Fixes to remove serious vulnerability found by Rocco Calvi
Galleries using the toolkit & other links
Download Now! Version 1.12 [GNU Public License]
Allows reading, writing and display of the following JPEG metadata formats
- EXIF 2.2 - including makernotes
- XMP / RDF, including multiple language support
- Dublin Core
- IPTC-NAA IIM 4.1
- Photoshop IRB
- Picture Info
- JFIF
- DCF 2.0
- TIFF/EP
- JFIF Extension
- Embedded s
- Intrinsic JPEG Values
Other features:
- Tested with over 450 popular digital cameras - See here for details
- Provides access to lots of metadata for which php has no built in support
- Works with many files that have corrupted metadata.
- Customisable look of the HTML output via style sheets
- Works with PHP4 and does not require the --enable-exif extension
- Allows metadata editing just like in Photoshop "File Info" box
More Information:
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This example script is included with the PHP JPEG Metadata Toolkit. It shows how the library can be used to display detailed metadata from a JPEG image file. This is an explanation of some of the commands used in the script.
Click here to see the script
Error Reporting
Although this library has been tested to be error free on a large number of images, it is good programming to turn error reporting off, to ensure that users don't see any error messages. This is not just cosmetic, it helps hide the details of the program from hackers.
// Turn off Error Reporting
error_reporting [ 0 ];
Includes
Ensure that the correct files are included:
| JPEG.php | For accessing basic JPEG functions - most programs will need this |
| EXIF.php | For accessing Exchangeable Image File Format [EXIF] APP1 segments |
| JFIF.php | For accessing JPEG File Interchange Format and JFIF Extension segments |
| Photoshop_IRB.php | For accessing Photoshop IRB & IPTC-NAA IIM segments |
| PictureInfo.php | For accessing APP12 Picture Info segments |
| XMP.php | For accessing APP1 XMP / RDF / Dublin Core segments |
Displaying Metadata Information
Displaying metadata in HTML format from a PHP script is very simple. For example, the following will display any EXIF information in a JPEG image:
echo Interpret_EXIF_to_HTML[ get_EXIF_JPEG[ $filename ], $filename ];
To display the Photoshop IRB and IPTC-NAA information, use:
echo Interpret_IRB_to_HTML[ get_Photoshop_IRB[ get_jpeg_header_data[ $filename ] ], $filename ];
Note: The HTML returned from these functions is just a fragment, and requires , and tags to be provided.
Writing Metadata Information
Although this is not shown in the example script, writing metadata is also very simple. For example, the following will allow the EXIF data in an image to be modified, and written to a file called "output.jpg" :
$exif_data = get_EXIF_JPEG[ $filename ];
// Modify the $exif_data array here
$jpeg_header_data = put_EXIF_JPEG[ $exif_data, $jpeg_header_data ];
put_jpeg_header_data[ $filename, "output.jpg", $jpeg_header_data ];