Expresiones Regulares

Array
(
    [0] => Array
        (
            [0] => hola hola,.. si probando probando... unod, dos
            [1] => 
            [2] => 
            [3] => 
            [4] => 
            [5] => 
            [6] => tres.. probando.
            [7] => 
            [8] => 
            [9] => 
            [10] => uyuju
            [11] => 
            [12] => yuju jeje jiji joj ojuj
            [13] => 
            [14] => hola hola
            [15] => 
        )

)