有人说<?php
$q = $_GET['q'];
function showRoadMap($q) {
$conn.... //cut connection with database
$sql = "SELECT * FROM roadmap WHERE status={$q}";
$result = $conn->query($sql);
if ($result->num_rows > 0) {
echo '
<table class="showGrid">
<tr>
<td>Name</td>
<td>Status</td>
</tr>';
while($row = $result->fetch_assoc()) {
echo '<tr><td>'.$row['name'].'</a></td>
<td>'.$row['status'].'</td></tr>';
}
echo '</table>';
}
else
echo 'No record found';
}
showRoadMap($q);
?>
中的代码是多项式是什么意思？然后如何确保他的代码在n？