各位GG,小妹请帮助

chongqinggirl 2005-10-20 02:19:10

这是我在网上看到一段代码.想实现修改,删除数据字段.小妹是刚毕业的想学php,多谢帮助!!!
QQ:20263303

<html>

<body>

<?php

$db = mysql_connect("localhost", "root","abcdef

mysql_select_db("mydb",$db);

if ($submit) {

// 如果没有ID，则我们是在增加记录，否则我们是在修改记录

if ($id) {

$sql = "UPDATE employees SET first='$first',last='$last',
address='$address',position='$position' WHERE id=$id";

} else {

$sql = "INSERT INTO employees (first,last,address,position)
VALUES ('$first','$last','$address','$position')";

}

// 向数据库发出SQL命令

$result = mysql_query($sql);

echo "记录修改成功！<p>";

} elseif ($delete) {

// 删除一条记录

$sql = "DELETE FROM employees WHERE id=$id";

$result = mysql_query($sql);

echo "记录删除成功！<p>";

} else {

// 如果我们还没有按submit按钮，那么执行下面这部分程序

if (!$id) {

// 如果不是修改状态，则显示员工列表

$result = mysql_query("SELECT * FROM employees",$db);

while ($myrow = mysql_fetch_array($result))
{
printf("<a href=\"%s?id=%s\">%s %s</a> \n",
$PATH_INFO, $myrow["id"], $myrow["first"], $myrow["last"]);

printf("<a href=\"%s?id=%s&delete=yes\">(DELETE)</a><br>", $PATH_INFO, $myrow["id"]);

}

}

?>

<P>

<a href="<?php echo $PATH_INFO?>">ADD A RECORD</a>

<P>

<form method="post" action="<?php echo $PATH_INFO?>">

<?php

if ($id) {

// 我们是在编辑修改状态，因些选择一条记录

$sql = "SELECT * FROM employees WHERE id=$id";

$result = mysql_query($sql);

$myrow = mysql_fetch_array($result);

$id = $myrow["id"];

$first = $myrow["first"];

$last = $myrow["last"];

$address = $myrow["address"];

$position = $myrow["position"];

// 显示id，供用户编辑修改

?>

<input type=hidden name="id" value="<?php echo $id ?>">

<?php

}

?>

名：<input type="Text" name="first" value="<?php echo $first ?>"><br>

姓：<input type="Text" name="last" value="<?php echo $last ?>"><br>

住址：<input type="Text" name="address" value="<?php echo $address ?>"><br>

职位：<input type="Text" name="position" value="<?php echo $position ?>"><br>

<input type="Submit" name="submit" value="输入信息">

</form>

<?php

}

?>

</body>

</html>

...全文