1 <?php 2 /* 3 * 《PHP数据库部分功能实现》 4 */ 5 $KCNUM = @$_POST['KCNUM']; 6 //建立一个数据库连接 7 $conn = mysql_connect('localhost', 'root', '419257511'); 8 //指定连接的数据库 9 mysql_select_db('test', $conn); 10 //设置客户端字符集 11 mysql_query("set names 'gb2312'", $conn); 12 //执行sql语句查询课程号并将结果赋值给$RESULT 13 $RESULT = mysql_query("select * from two where 课程号='$KCNUM'"); 14 //将查询到的结果作为数组存储在$row 15 $row = mysql_fetch_array($RESULT); 16 //print_f($row); 17 if ($KCNUM != null && ! $row) { 18 echo "<script>alert('没有课程号！')</script>"; 19 } 20 ?> 21 <html> 22 <body> 23 <h3 align="center">课程表操作</h3> 24 <form name="fr1" method="post"> 25 <p align="center"> 26 根据课程号查询:<input type="number" name="KCNUM" value=""> <input 27 type="submit" name="bt1" value="查找"> 28 </p> 29 <form name="fr2" method="post"> 30 <center> 31 <table border="1"> 32 <tr bgcolor="blue"> 33 <td>课程号：</td> 34 <td><input type="number" name="KCnum" 35 value="<?php echo $row['课程号'] ?>"></td> 36 </tr> 37 <tr bgcolor="blue"> 38 <td>课程名：</td> 39 <td><input type="text" name="KCname" 40 value="<?php echo $row['课程名'] ?>"></td> 41 </tr> 42 <tr bgcolor="blue"> 43 <td>开课学期：</td> 44 <td><input type="number" name="KCterm" 45 value="<?php echo $row['开课学期'] ?>"></td> 46 </tr> 47 <tr bgcolor="blue"> 48 <td>学时：</td> 49 <td><input type="text" name="KCtime" 50 value="<?php echo $row['学时'] ?>"></td> 51 </tr> 52 <tr bgcolor="blue"> 53 <td>学分：</td> 54 <td><input type="number" name="KCcredit" 55 value="<?php echo $row['学分'] ?>"></td> 56 </tr> 57 <tr bgcolor="blue"> 58 <td colspan="2" align="center"><input type="submit" name="bt2" 59 value="修改"> <input type="submit" name="bt2" value="添加"> <input 60 type="submit" name="bt2" value="删除"> 61 62 </tr> 63 </table> 64 </center> 65 </form> 66 </form> 67 </body> 68 </html> 69 70 71 72 73 <?php 74 75 $KCnum = @$_POST['KCnum']; 76 $KCname = @$_POST['KCname']; 77 $KCterm = @$_POST['KCterm']; 78 $KCtime = @$_POST['KCtime']; 79 $KCcredit = @$_POST['KCcredit']; 80 //自定义函数，用来判断逻辑 81 function test($KCnum, $KCname, $KCterm, $KCtime, $KCcredit) 82 { 83 if (!$KCnum) 84 echo "<script>alert('课程号不能为空')</script>"; 85 elseif (!$KCname) 86 echo "<script>alert('课程名不能为空')</script>"; 87 elseif ($KCterm > 8 || $KCterm < 1) 88 echo "<script>alert('注意开课学期应为1-8')</script>"; 89 elseif (!is_numeric($KCtime)) 90 echo "<script>alert('学时必须是数字')</script>"; 91 } 92 //修改模块 93 if (@$_POST['bt2'] == "修改") { 94 //sql修改语句 95 $upd_query = "update two set 课程名='$KCname',开课学期='$KCterm',学时='$KCtime',学分='$KCcredit'where 课程号='$KCnum'"; 96 //执行上行语句并赋值给$upd_result 97 $upd_result = mysql_query($upd_query); 98 //mysql_affected_rows:返回前一次 MySQL 操作所影响的记录行数。 99 //mysql_affected_rows 在此处用来验证是否修改成功 100 if (mysql_affected_rows($conn) != 0) 101 echo "<script>alert('修改成功')</script>"; 102 else 103 echo "<script>alert('修改失败')</script>"; 104 } 105 //以下模块内容同上，就不做注释了 106 //添加模块 107 if (@$_POST['bt2'] == "添加") { 108 test($KCnum, $KCname, $KCterm, $KCtime, $KCcredit); 109 $s_sql = "select 课程号 from two where 课程号='$KCnum'"; 110 $s_result = mysql_query($s_sql); 111 $s_row = mysql_fetch_array($s_result); 112 if (!$s_row){ 113 $ins_sql = "insert into two (课程号,课程名,开课学期,学时,学分) values('$KCnum','$KCname','$KCterm','$KCtime','$KCcredit')"; 114 $ins_result = mysql_query($ins_sql) or die('<script>alert("添加失败")</script>'); 115 if (mysql_affected_rows($conn) != 0) 116 echo "<script>alert('添加成功！')</script>"; 117 else 118 echo "<script>alert('未知错误！')</script>"; 119 } 120 else { 121 echo "<script>alert('该课程号已存在，无法添加!')</script>"; 122 } 123 } 124 //删除模块 125 if (@$_POST['bt2'] == "删除") { 126 $d_sql = "select 课程号 from two where 课程号='$KCnum'"; 127 $d_result=mysql_query($d_sql); 128 $d_row=mysql_fetch_array($d_result); 129 if(!$d_row) 130 echo "<script>alert('课程号不存在')</script>"; 131 else{ 132 $del_sql="delete from two where 课程号='$KCnum'"; 133 $del_result=mysql_query($del_sql) or die('删除失败'); 134 if(mysql_affected_rows($conn)!=0) 135 echo "<script>alert('删除成功')</script>"; 136 } 137 } 138 ?>