List libraries we can use to extract and manage image metadata

[oparoz]

This is an investigative task.

• Some libraries are faster than others
• We may not want to touch all available file formats, at least not at the beginning
• We will prefer maintained libraries
• We will prefer smaller libraries which focus on a single task

Type of data we will encounter:

• EXIF
• IPTC
• XMP

[imjalpreet]

@oparoz,
EXIF DATA:
We can use the exif_read_data for getting the exif metadata and then choose the data fields which we want to use.

IPTC DATA:
Similarly, we can use the iptcparse for the case of iptc data.

XMP Data:
I have tried out a method to extract the xmp data on my own as there isn’t any php library for the same. It is not very difficult to extract it as it is mere xml data.