Separate array in php

I'm trying to leave the array separate but it comes all together this way fernandohenriquelopes I wanted to separate them so I can do multiple insert in the database so the code is

// aqui recebe em array 

$dad = filter_input(INPUT_POST, 'tituloFoto', FILTER_DEFAULT, FILTER_REQUIRE_ARRAY); 

foreach ($dad as $id => $titulos) {

$re = array( ++$id => $titulos);

print_r($re); // desta forma sai normal 

//Array ( [1] => fernadno ) Array ( [2] => rafael ) Array ( [3] => yeyeye )

// se eu tirar o print_r fica assim
Notice: Array to string conversion in C:\xampp\htdocs\arte-beleza\galeria-gravar.php on line 21
Array (3x)
    }

When I write to the bank it only shows array 3 times Does anyone help me?