PHP PDO prepared statement IN() array [duplicate]

Here's some code I whipped up to simulate the desired outcome:

<?php
function preprepare(&$query, &$data) {
    preg_match_all('/\?/', $query, $matches, PREG_OFFSET_CAPTURE);
    $num = count($matches[0]);
    for ($i = $num; $i;) {
        --$i;
        if (array_key_exists($i, $data) && is_array($data[$i])) {
            $query = substr_replace($query, implode(',', array_fill(0, count($data[$i]), '?')), $matches[0][$i][1], strlen($matches[0][$i][0]));
            array_splice($data, $i, 1, $data[$i]);
        }
    }
}

$query = 'SELECT * FROM `table` WHERE `col1` = ? AND `col2` IN(?) AND `col3` = ? AND `col4` IN(?)';
$data = array('foo', array(1, 2, 3), 'bar', array(4, 2));
preprepare($query, $data);
var_dump($query, $data);
?>

It outputs:

array (size=2)
  0 => string 'SELECT * FROM `table` WHERE `col1` = ? AND `col2` IN(?,?,?) AND `col3` = ? AND `col4` IN(?,?)' (length=93)
  1 => 
    array (size=7)
      0 => string 'foo' (length=3)
      1 => int 1
      2 => int 2
      3 => int 3
      4 => string 'bar' (length=3)
      5 => int 4
      6 => int 2

The query and data can then be used in a normal PDO prepared statement. I don't know if it accounts for all PDO magic niceness but it works pretty well so far.