Get base de datos Informix

function getDocenciaList()
{
$link = db_conn();  // CONNECTION
if (!$link)
{
echo "<script> alert('ERROR!: no se puede conectar a la Base de Datos.');history.go(-1);</script>";
die;
}
$rows = array();
$query = "SELECT * FROM docencia";
$result0 = ifx_query($query, $link);
$result1 = ifx_fetch_row ($result0 );
while ($result1 = ifx_fetch_row ($result0 ))
{
$rows[] = $result1;
}
echo json_encode($rows);
}