PHP-2.數據庫小功能
阿新 • • 發佈：2018-06-17
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1 <?php 2 /* 3 * 《PHP數據庫部分功能實現》 4 */ 5 $KCNUM = @$_POST[‘KCNUM‘]; 6 //建立一個數據庫連接 7 $conn = mysql_connect(‘localhost‘, ‘root‘, ‘419257511‘); 8 //指定連接的數據庫 9 mysql_select_db(‘test‘, $conn); 10 //設置客戶端字符集 11 mysql_query("set names ‘gb2312‘", $conn); 12 //執行sql語句查詢課程號並將結果賦值給$RESULT 13 $RESULT= mysql_query("select * from two where 課程號=‘$KCNUM‘"); 14 //將查詢到的結果作為數組存儲在$row 15 $row = mysql_fetch_array($RESULT); 16 //print_f($row); 17 if ($KCNUM != null && ! $row) { 18 echo "<script>alert(‘沒有課程號！‘)</script>"; 19 } 20 ?> 21 <html> 22 <body> 23 <h3 align="center">課程表操作</h3> 24<form name="fr1" method="post"> 25 <p align="center"> 26 根據課程號查詢:<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>課程號：</td> 34 <td><input type="number" name="KCnum" 35 value="<?php echo $row[‘課程號‘] ?>"></td> 36 </tr> 37 <tr bgcolor="blue"> 38 <td>課程名：</td> 39 <td><input type="text" name="KCname" 40 value="<?php echo $row[‘課程名‘] ?>"></td> 41 </tr> 42 <tr bgcolor="blue"> 43 <td>開課學期：</td> 44 <td><input type="number" name="KCterm" 45 value="<?php echo $row[‘開課學期‘] ?>"></td> 46 </tr> 47 <tr bgcolor="blue"> 48 <td>學時：</td> 49 <td><input type="text" name="KCtime" 50 value="<?php echo $row[‘學時‘] ?>"></td> 51 </tr> 52 <tr bgcolor="blue"> 53 <td>學分：</td> 54 <td><input type="number" name="KCcredit" 55 value="<?php echo $row[‘學分‘] ?>"></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="刪除"> 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 //自定義函數，用來判斷邏輯 81 function test($KCnum, $KCname, $KCterm, $KCtime, $KCcredit) 82 { 83 if (!$KCnum) 84 echo "<script>alert(‘課程號不能為空‘)</script>"; 85 elseif (!$KCname) 86 echo "<script>alert(‘課程名不能為空‘)</script>"; 87 elseif ($KCterm > 8 || $KCterm < 1) 88 echo "<script>alert(‘註意開課學期應為1-8‘)</script>"; 89 elseif (!is_numeric($KCtime)) 90 echo "<script>alert(‘學時必須是數字‘)</script>"; 91 } 92 //修改模塊 93 if (@$_POST[‘bt2‘] == "修改") { 94 //sql修改語句 95 $upd_query = "update two set 課程名=‘$KCname‘,開課學期=‘$KCterm‘,學時=‘$KCtime‘,學分=‘$KCcredit‘where 課程號=‘$KCnum‘"; 96 //執行上行語句並賦值給$upd_result 97 $upd_result = mysql_query($upd_query); 98 //mysql_affected_rows:返回前一次 MySQL 操作所影響的記錄行數。 99 //mysql_affected_rows 在此處用來驗證是否修改成功 100 if (mysql_affected_rows($conn) != 0) 101 echo "<script>alert(‘修改成功‘)</script>"; 102 else 103 echo "<script>alert(‘修改失敗‘)</script>"; 104 } 105 //以下模塊內容同上，就不做註釋了 106 //添加模塊 107 if (@$_POST[‘bt2‘] == "添加") { 108 test($KCnum, $KCname, $KCterm, $KCtime, $KCcredit); 109 $s_sql = "select 課程號 from two where 課程號=‘$KCnum‘"; 110 $s_result = mysql_query($s_sql); 111 $s_row = mysql_fetch_array($s_result); 112 if (!$s_row){ 113 $ins_sql = "insert into two (課程號,課程名,開課學期,學時,學分) values(‘$KCnum‘,‘$KCname‘,‘$KCterm‘,‘$KCtime‘,‘$KCcredit‘)"; 114 $ins_result = mysql_query($ins_sql) or die(‘<script>alert("添加失敗")</script>‘); 115 if (mysql_affected_rows($conn) != 0) 116 echo "<script>alert(‘添加成功！‘)</script>"; 117 else 118 echo "<script>alert(‘未知錯誤！‘)</script>"; 119 } 120 else { 121 echo "<script>alert(‘該課程號已存在，無法添加!‘)</script>"; 122 } 123 } 124 //刪除模塊 125 if (@$_POST[‘bt2‘] == "刪除") { 126 $d_sql = "select 課程號 from two where 課程號=‘$KCnum‘"; 127 $d_result=mysql_query($d_sql); 128 $d_row=mysql_fetch_array($d_result); 129 if(!$d_row) 130 echo "<script>alert(‘課程號不存在‘)</script>"; 131 else{ 132 $del_sql="delete from two where 課程號=‘$KCnum‘"; 133 $del_result=mysql_query($del_sql) or die(‘刪除失敗‘); 134 if(mysql_affected_rows($conn)!=0) 135 echo "<script>alert(‘刪除成功‘)</script>"; 136 } 137 } 138 ?>
PHP-2.數據庫小功能