Bug #73004 [Com]: PHP 5.6 Doesn't Read EXIF Location

From: Date: Wed, 14 Sep 2016 21:23:06 +0000
Subject: Bug #73004 [Com]: PHP 5.6 Doesn't Read EXIF Location
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=73004&edit=1

 ID:                 73004
 Comment by:         dotpointer at gmail dot com
 Reported by:        tom_kincaid at hotmail dot com
 Summary:            PHP 5.6 Doesn't Read EXIF Location
 Status:             Open
 Type:               Bug
 Package:            EXIF related
 Operating System:   Centos 7
 PHP Version:        5.6.25
 Block user comment: N
 Private report:     N

 New Comment:

I'm running Debian 8.5 and the Debian (apt-get) supplied version: PHP 5.6.24-0+deb8u1.

I have also this bug - exif_read_data() has stopped outputting GPS tags in my case.

I guess it has todo with the security fix recently applied, noted here:
http://stackoverflow.com/questions/38772471/php-exif-read-data-no-longer-extracts-gps-location

I understand that security fixes are crucial, but don't know how this regression in
functionality could have reached production level as I'm running an updated standard Debian
installation and not testing. 

GPS reading implementations in PHP are probably breaking all around the planet right now. I hope
this will be fixed soon for 5.6+ too.


Previous Comments:
------------------------------------------------------------------------
[2016-09-02 14:10:35] tom_kincaid at hotmail dot com

Description:
------------
exif_read_data on 5.6 doesn't read the EXIF location data. This data is in the photo, but
doesn't appear in the response from exif_read_data

    [GPSLatitudeRef] => N
    [GPSLatitude] => Array
        (
            [0] => 40/1
            [1] => 42/1
            [2] => 4941/100
        )

    [GPSLongitudeRef] => W
    [GPSLongitude] => Array
        (
            [0] => 73/1
            [1] => 57/1
            [2] => 2954/100
        )

Here is a sample image with EXIF GPS location:

https://dl.dropboxusercontent.com/u/34732957/test.jpg

Test script:
---------------
$exif = exif_read_data ("/path/to/photo.jpg");
print_r($exif);

Expected result:
----------------
Array
(
    [FileName] => test.jpg
    [FileDateTime] => 1472824820
    [FileSize] => 1406969
    [FileType] => 2
    [MimeType] => image/jpeg
    [SectionsFound] => ANY_TAG, IFD0, THUMBNAIL, EXIF, GPS
    [COMPUTED] => Array
        (
            [html] => width="3264" height="2448"
            [Height] => 2448
            [Width] => 3264
            [IsColor] => 1
            [ByteOrderMotorola] => 1
            [ApertureFNumber] => f/2.2
            [Thumbnail.FileType] => 2
            [Thumbnail.MimeType] => image/jpeg
        )

    [Make] => Apple
    [Model] => iPhone 5s
    [Orientation] => 1
    [XResolution] => 72/1
    [YResolution] => 72/1
    [ResolutionUnit] => 2
    [Software] => 9.2
    [DateTime] => 2016:04:10 17:05:26
    [YCbCrPositioning] => 1
    [Exif_IFD_Pointer] => 198
    [GPS_IFD_Pointer] => 1612
    [THUMBNAIL] => Array
        (
            [Compression] => 6
            [XResolution] => 72/1
            [YResolution] => 72/1
            [ResolutionUnit] => 2
            [JPEGInterchangeFormat] => 1952
            [JPEGInterchangeFormatLength] => 9663
        )

    [ExposureTime] => 1/1709
    [FNumber] => 11/5
    [ExposureProgram] => 2
    [ISOSpeedRatings] => 32
    [ExifVersion] => 0221
    [DateTimeOriginal] => 2016:04:10 17:05:26
    [DateTimeDigitized] => 2016:04:10 17:05:26
    [ComponentsConfiguration] => 
    [ShutterSpeedValue] => 19277/1795
    [ApertureValue] => 7983/3509
    [BrightnessValue] => 6632/653
    [ExposureBiasValue] => 0/1
    [MeteringMode] => 5
    [Flash] => 24
    [FocalLength] => 83/20
    [SubjectLocation] => Array
        (
            [0] => 1632
            [1] => 1224
            [2] => 1793
            [3] => 1073
        )

    [MakerNote] => Apple iOS...
    [SubSecTimeOriginal] => 986
    [SubSecTimeDigitized] => 986
    [FlashPixVersion] => 0100
    [ColorSpace] => 1
    [ExifImageWidth] => 3264
    [ExifImageLength] => 2448
    [SensingMethod] => 2
    [SceneType] => 
    [ExposureMode] => 0
    [WhiteBalance] => 0
    [DigitalZoomRatio] => 1224/463
    [FocalLengthIn35mmFilm] => 76
    [SceneCaptureType] => 0
    [UndefinedTag:0xA432] => Array
        (
            [0] => 83/20
            [1] => 83/20
            [2] => 11/5
            [3] => 11/5
        )

    [UndefinedTag:0xA433] => Apple
    [UndefinedTag:0xA434] => iPhone 5s back camera 4.15mm f/2.2
    [GPSLatitudeRef] => N
    [GPSLatitude] => Array
        (
            [0] => 40/1
            [1] => 42/1
            [2] => 4941/100
        )

    [GPSLongitudeRef] => W
    [GPSLongitude] => Array
        (
            [0] => 73/1
            [1] => 57/1
            [2] => 2954/100
        )

    [GPSAltitudeRef] => 
    [GPSAltitude] => 9068/843
    [GPSTimeStamp] => Array
        (
            [0] => 21/1
            [1] => 5/1
            [2] => 2426/100
        )

    [GPSSpeedRef] => K
    [GPSSpeed] => 0/1
    [GPSDateStamp] => 2016:04:10
    [UndefinedTag:0x001F] => 65/1
)


Actual result:
--------------
Array
(
    [FileName] => test.jpg
    [FileDateTime] => 1472776885
    [FileSize] => 1406969
    [FileType] => 2
    [MimeType] => image/jpeg
    [SectionsFound] => ANY_TAG, IFD0, EXIF
    [COMPUTED] => Array
        (
            [html] => width="3264" height="2448"
            [Height] => 2448
            [Width] => 3264
            [IsColor] => 1
            [ByteOrderMotorola] => 1
            [ApertureFNumber] => f/2.2
        )

    [Make] => Apple
    [Model] => iPhone 5s
    [Orientation] => 1
    [XResolution] => 72/1
    [YResolution] => 72/1
    [ResolutionUnit] => 2
    [Software] => 9.2
    [DateTime] => 2016:04:10 17:05:26
    [YCbCrPositioning] => 1
    [ExposureTime] => 1/1709
    [FNumber] => 11/5
    [ExposureProgram] => 2
    [ISOSpeedRatings] => 32
    [ExifVersion] => 0221
    [DateTimeOriginal] => 2016:04:10 17:05:26
    [DateTimeDigitized] => 2016:04:10 17:05:26
    [ComponentsConfiguration] => 
    [ShutterSpeedValue] => 19277/1795
    [ApertureValue] => 7983/3509
    [BrightnessValue] => 6632/653
    [ExposureBiasValue] => 0/1
    [MeteringMode] => 5
    [Flash] => 24
    [FocalLength] => 83/20
    [SubjectLocation] => Array
        (
            [0] => 1632
            [1] => 1224
            [2] => 1793
            [3] => 1073
        )

)


------------------------------------------------------------------------



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