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.

Patch for Ticket #16106 - image.diff

Thanks for reporting the issue.

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

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.

Accept EXIF isoSpeedRatings as either array or string