修改信息成功后内容未变
系统有4处错误提示，分别在第15、17、25、26行。Undefined variable number1（PS：我发现我一个月都在问这个问题……惭愧）
<?php<br />
include "conn.php";<br />
include "admin_header.php";<br />
extract($_REQUEST);<br />
<br />
$query="update $jiaoshi_table set subject='$newsubject',teacher='$newteacher',zhicheng='$newzhicheng',specialized='$newspecialized',code='$newcode',intrduction='newintroduction' where id='$id'";<br />
mysql_query("set names 'GB2312'");<br />
$result=mysql_query($query);<br />
<br />
<br />
$query="select number as sn,surplus as ssn from $jiaoshi_table where id='$id'";<br />
mysql_query("set names 'GB2312'");<br />
$result=mysql_query($query);<br />
$row=mysql_fetch_array($result);<br />
if($number1<$row['sn'])<br />
{<br />
if($number1<($row['sn']-$row['ssn']))<br />
{<br />
echo"<p align=\"center\"><font color=\"#FF0000\"><b><big>人数不能少于现已选题人数，人数列修改失败！</big></b></font>";<br />
echo"<meta http-equiv=\"refresh\" content=\"2;url=alter_keti.php\">";<br />
exit;<br />
}<br />
else<br />
{<br />
$query2=mysql_query("update $jiaoshi_table set number='$number1' where id='$id'");<br />
$query3=mysql_query("update $jiaoshi_table set surplus=surplus-($row[sn]-$number1) where id='$id'");<br />
mysql_query("set names 'GB2312'");<br />
$result1=mysql_query($query3);<br />
}<br />
}<br />
else<br />
{<br />
$query4=mysql_query("update $jiaoshi_table set number='$number1' where id='$id'");<br />
$query5=mysql_query("update $jiaoshi_table set surplus=surplus+($number1-$row[sn]) where id='$id'");<br />
mysql_query("set names 'gb2312'");<br />
$result2=mysql_query($query5);<br />
}<br />
if($result==true)<br />
{<br />
echo"<p align=\"center\"><font color=\"#FF0000\"><b><big>修改课题成功！</big></b></font>";<br />
echo "<meta http-equiv=\"refresh\" content=\"1;url=alter_keti.php\">";<br />
exit;<br />
}<br />
else<br />
{<br />
echo"<p align=\"center\"><font color=\"#FF0000\"><b><big>修改出错，请返回重新修改</big></b></font></p>";<br />
echo "<meta http-equiv=\"refresh\" content=\"1;url=alter_keti.php\">"; <br />
exit;<br />
}<br />
<br />
?><br />
<?php include "foot.php";?>
