How to check array exist when using magic field

How to check array exist when using magic field

References

Reference NO 1

http://stackoverflow.com/questions/15194189/how-to-check-array-exist-when-using-magic-field

Reference NO 2

https://github.com/hunk/Magic-Fields/issues/173

Reference NO 3

http://magicfields.org/types-of-custom-fields/

Reference NO 4

http://php.net/manual/en/function.empty.php

Reference NO 5

http://magicfields17.wordpress.com/magic-fields-functions/

Reference NO 6

http://wordpress.stackexchange.com/questions/16108/display-custom-field-only-if-value-present

Reference NO 7

http://docs.doctrine-project.org/projects/doctrine1/en/latest/en/manual/component-overview.html

Reference NO 8

http://www.webmastertools.fm/how-to/Get+dimensions+of+referenced+image+(Magic+Fields