Php/docs/exif.requirements
From Get docs
Requirements
Your PHP must be compiled in with --enable-exif
. To enable
multibyte support in EXIF tags, the mbstring
extension must be enabled by compiling PHP with --enable-mbstring
.
PHP does not require any additional library for the exif module.
Windows only: The mbstring extension must always
be enabled. Note that mbstring extension must be
loaded prior to EXIF in php.ini
.