当我点击删除按钮时。第二页不删除查询而是说:查询中出错:未选择数据库选定的行已删除。我想删除所选的查询。
我应该包含哪些代码,以便第二页重定向到第一页?
query4.php
<html>
<title> Queries</title>
<body>
<h1> List of Queries</h1>
<form method=post action="delete4.php">
<?php
$ebits = ini_get('error_reporting');
error_reporting($ebits ^ E_NOTICE);// Turns off all the notices &warnings
mysql_connect("localhost","root","") or die(mysql_error());//Connects to the DB
mysql_select_db("testdb") or die(mysql_error()); //Selects one database
echo "<br />";
$query = "select * from queries ";
$result = mysql_query($query) or die(mysql_error()); //sends a unique query to
active database on the server
$count=mysql_num_rows($result);
echo "<table border=\"1\">";
echo "<th><tr><td>
</td><td>Name</td><td>Address</td><td>ContactNo</td><td>Query</td></tr></th>";
while($row = mysql_fetch_array($result))
{
echo"<tr>";
echo"<td><input type='checkbox' name='Query[]' value=\"".$row['queryId']."\"></td>";
echo " <td>" . $row['name'] . "</td><td>" . $row['address'] . "</td><td>" . $row
['contactNo'] . "</td><td>" . $row['query'] . "</td>";
echo"</tr>\n";
}
?>
<input type="submit" value="Delete" name="Delete">
<br/>
</form>
</body>
</html>
delete4.php
<?php
if (isset($_POST['Delete']))
{
foreach ($_POST['Query'] as $checkbox)
{
echo "$checkbox";
$conn= mysql_connect("localhost","root","") or die(mysql_error());
$sql = mysql_select_db("testdb") or die(mysql_error());
$del = mysql_query("DELETE * FROM queries WHERE queryId=$checkbox");
$rs = mysql_query( $del) or die(mysql_error());
if($rs)
{
echo ("Records Deleted");
}
else
{
echo ("No Way");
}
}
}
?>
答案 0 :(得分:0)
delete4.php应该是:
<?php
$conn = mysql_connect("localhost","root","") or die(mysql_error());
$db = mysql_select_db("testdb") or die(mysql_error());
if (isset($_POST['Delete']))
{
foreach ($_POST['Query'] as $checkbox)
{
echo "$checkbox";
$del = mysql_query("DELETE * FROM queries WHERE queryId=$checkbox")
or die(mysql_error));
if($del)
{
echo ("Records Deleted");
}
else
{
echo ("No Way");
}
}
}
?>
请注意,有很多改进。
您正在foreach
内连接到数据库,这是多余的,浪费资源 - 想象一下,如果您有数千个项目要循环 - 这将涉及到数千个不必要的调用。
您还要调用mysql_query
两次,将第一个查询的结果传递给第二个查询,这会导致问题。
您可以使用header('Location:http://site.com/script.php');
重定向到另一个页面,但前提是在标题调用之前没有输出。在你的脚本中,你有html输出,所以如果没有进一步的修改,这将无法工作。