Using piklist meta box, strange behavior

By default get_post_meta() returns an array. Set the last parameter to true to return the value of the meta data.

See the codex as a reference >

Your code should be:

$font_awesome_icon = get_post_meta(get_the_ID(), 'font-awesome-icon', true); 

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)