PHP批量增加、删除、更新数据

<?php
 echo “<form method=’post’ name=’form1′ action=’#’>”;
 echo “<table border=1>”;
 while($row=mysql_fetch_row($sql))
 {
  $id=$row[0];
  $beizhu=$row[3];
  echo “<tr>”;
  echo “<td><input type=’checkbox’ name=’del[]’ value=’$id’></td>”; 
  echo “<td>$id</td>”;
  echo “<td>$beizhu</td>”;
  echo “</tr>”; 
 }
 echo “</table>”;
 echo “<input type=’reset’ name=’reset’ value=’重选’><input type=’submit’ name=’submit’ value=’提交’></form>”;
 if($_POST[‘submit’]!=””)
 { 
 foreach($_POST[‘del’] as $id)
  { 
 $query=mysql_query(“delete from admin where id={$id}”)or die(“删除失败”);
 }
 }
?>