array(6) { [0]=> string(68) "Essential MATLAB for Engineers and Scientists 5th ed - Brian D. Hahn" [1]=> string(30) " Daniel T. Valentine (Elsevier" [2]=> string(3) " AP" [3]=> string(10) " 2013).pdf" [4]=> string(9) " 20885415" [5]=> string(21) " 2017-10-18 21:37:0 " }