Error reading EXIF data from uploaded image

[4D4M]

When the user uploads an image file with EXIF data, that data is saved to the database. exif_read_data() reads the EXIF headers from a JPEG or TIFF image file. This way you can read meta data generated by digital cameras.

In this case the EXIF 'ISOSpeedRatings' key had an array for a value, but a string was expected. So the subsequent trim() call failed.

Patch attached.

[4D4M]

Patch for Ticket #16106 - image.diff

[hakre]

Thanks for reporting the issue and providing a patch.

[Otto42]

Can we get an example image file that causes the problem?

[solarissmoke]

Apparently some cameras do provide more than one ISO value (HI and LO). In any case I checked the ISO specification (​http://www.exif.org/specifications.html) and multiple values are permitted for isoSpeedRatings:

ISOSpeedRatings
Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232. 
Tag  =      34855 (8827.H) 
Type  =      SHORT 
Count  =      Any **This means multiple values acceptable**
Default  =      none 

Think this could be done without defining a new function however.

[solarissmoke]

Accept EXIF isoSpeedRatings as either array or string

[c3mdigital]

This was fixed in #20807

Closing as duplicate.