DataTables - dynamic creation and population

/**
* Crea tabella dinamica in modo automatico
*
* @param string $dataTableName ID da assegnare alla tabella non dimenticare inizializzazione jquery
* @param string $tableName Nome tabella mysql
* @param array $a_colName Titoli delle colonne
* @param array $a_fields Nome dei campi come db
*/
function dataTable($dataTableName, $tableName, $a_colName, $a_fields){
global $page;
mysql_connect("localhost", "root", "");
mysql_select_db("db");
if( count($a_colName) != count($a_fields) ){
echo "errore #3001";
exit();
}
$numCol = count($a_colName);
$q = "SELECT id, ";
foreach ($a_fields AS $campo){
$q .= $campo . ", ";
}
$q = substr($q, 0, -2);
$q .= " FROM $tableName";
$result = mysql_query($q);
if(!$result) echo mysql_error ();
echo "<table id=\"$dataTableName\" cellpadding=\"0\" cellspacing=\"0\" border=\"0\" class=\"table table-bordered table-striped\">";
echo "<thead>";
foreach ($a_colName AS $col){
echo "<th>" . $col . "</th>" ;
}
echo "</thead>";
$count = mysql_affected_rows();
if($count != 0) {
while ( $data = mysql_fetch_assoc($result) ){
echo '<tr id="' . $data['id'] . '"> ';
foreach ($a_fields AS $campo){
echo "<td>" . $data[$campo] . "</td>" ;
}
echo '</tr>';
}
} else {
echo "";
}
echo "</table>";
echo ' <script> $(document).ready(function() { $("#'.$dataTableName .'").dataTable(); });</script>';
}