Just having fun...
Obfuscated #1
This evaluates to the string "?".
??????????????:????????:??:??:??:??:?????:?? # => "?"
Obfuscated #2
$i=0;[$c="[$s=['p '],[$s<<[*1?3??'+?<+?3:?y:?]],$s+=[?b],$s|=[*?y+?'],$s[2,0]=5??r+?u:?$],($i+=1)<30?eval($s.join<<?;<<$c):nil]",eval($c)]
Output
"<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby" "<3ruby"