8-2 上課範例：add_class.php

<?php
error_reporting(0);
$link=@mysql_connect("localhost" , "tad0616" ,"12345");

if(!$link)  echo "資料庫連不上！";

//設定使用UTF8編碼
mysql_query("SET NAMES 'utf8'");

//選擇資料庫
mysql_select_db('tad0616');

$op=isset($_REQUEST['op'])?$_REQUEST['op']:"";
$class_sn=isset($_REQUEST['class_sn'])?intval($_REQUEST['class_sn']):"";

$next_op=($class_sn)?"update":"insert";

if($op=="edit"){
  //設定SQL語法
  $sql="select * from `tncomu_class` where class_sn='{$class_sn}'";

  //執行SQL語法
  $result=mysql_query($sql) or die("無法執行：".mysql_error());
 
  //擷取資料回來存到 $data
  $data=mysql_fetch_assoc($result);
 
  //還原下拉選單預設值
  $opt1=($data['subject']=="語言與文化")?"selected":"";
  $opt2=($data['subject']=="生命與健康")?"selected":"";
  $opt3=($data['subject']=="社會與生活")?"selected":"";
  $opt4=($data['subject']=="自然與環境")?"selected":"";
  $opt5=($data['subject']=="美學與藝術")?"selected":"";
  $opt6=($data['subject']=="資訊與傳播")?"selected":"";
  $opt7=($data['subject']=="台江分校")?"selected":"";
  $opt8=($data['subject']=="台江大廟興學")?"selected":"";

  $radio1=($data['access']=="1")?"checked":"";
  $radio0=($data['access']=="0")?"checked":"";
}


$main="
<meta http-equiv='content-type' content='text/html; charset=utf-8'>
<form action='save_class.php' method='post'>
學年學期：<input type='text' name='seme' size='4' value='{$data['seme']}'><br>
所屬學程：<select name='subject' size=1>
  <option value='語言與文化' $opt1>語言與文化</option>
  <option value='生命與健康' $opt2>生命與健康</option>
  <option value='社會與生活' $opt3>社會與生活</option>
  <option value='自然與環境' $opt4>自然與環境</option>
  <option value='美學與藝術' $opt5>美學與藝術</option>
  <option value='資訊與傳播' $opt6>資訊與傳播</option>
  <option value='台江分校' $opt7>台江分校</option>
  <option value='台江大廟興學' $opt8>台江大廟興學</option>
</select>
<br>
班級名稱：<input type='text' name='class_name' size='30' value='{$data['class_name']}'><br>
講師名稱：<input type='text' name='teacher' size='10' value='{$data['teacher']}'><br>
管理密碼：<input type='text' name='passwd' size='10' value='{$data['passwd']}'><br>
是否開放：
<input type='radio' name='access' value='1' id='show' $radio1><label for='show'>開放</label>
<input type='radio' name='access' value='0' id='hide' $radio0><label for='hide'>隱藏</label>
<br>
<input type='hidden' name='op' value='{$next_op}'>
<input type='hidden' name='class_sn' value='{$class_sn}'>
<input type='submit' value='儲存'>
</form>";

echo $main;
?>