1.利用insert 語句添加記錄
<? require('conn.php'); mysql_query( "insert into lyb ( title, content, author, email,`date`) values ('大家好', 'PHP學習園地', '小浣熊', 'sdf@sd.com','2012-3-3')") or die('執行失敗'); echo '新增記錄的id是'.mysql_insert_id(); //可選，輸出新記錄的id ?>
２.利用delete語句刪除數據
<? require('conn.php'); mysql_query( " Delete from lyb where ID in(158,162,163,169)") or die('執行失敗'); ?> 本次操作共有<?= mysql_affected_rows() ?>條記錄被刪除！
３.利用updata語句更新數據
<? require('conn.php'); mysql_query("Update lyb set email='rong@163.com', author='蓉蓉' where ID>133 and ID<143") or die('執行失敗'); ?>
接下來演示一個完整的例子
5.1.php為插入頁面
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 13:50:48 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); if (isset($_POST['submit'])) { require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 $title = $_POST['title']; $author = $_POST['author']; $content = $_POST['content']; $email = $_POST['email']; $result = mysql_query("insert into `lyb1`(`id`,`title`,`content`,`author`,`email`) values(null,'$title','$content','$author','$email')")or die('執行失敗');; var_dump($result); echo "新增的記錄的id為".mysql_insert_id(); mysql_free_result($result); mysql_close($result); echo "<script>alert('插入完成');</script>"; header("Location:5.6.php"); /* header("refresh:3;url=5.6.php");*/ //3秒后 頁面跳轉 } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>添加數據頁面</title> </head> <body> <form action="5.1.php" method="POST"> <p>添加新聞頁面</p> <div>標題:<input type="text" name="title" id=""></div> <div>內容: <textarea name="content" id="" cols="30" rows="5"></textarea></div> <div>作者:<input type="text" name="author" id=""></div> <div>郵箱:<input type="text" name="email" id=""></div> <div><input type="reset" value="重置"><input type="submit" name="submit" value="提交"></div> </form> </body> </html>
5.6.php為從數據庫后台提取數據 顯示在前台的頁面
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 15:10:04 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 $result = mysql_query("select * from `lyb1`",$conn);//選擇數據庫表 ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <a href="5.1.php">添加記錄</a> <table border="1"> <tr bgcolor="#ccc"> <th>序號</th> <th>標題</th> <th>內容</th> <th>作者</th> <th>郵箱</th> <th>刪除</th> <th>更新</th> </tr> <?php while ($row = mysql_fetch_assoc($result)) { ?> <tr> <td><?= $row['id']?></td> <td><?= $row['title']?></td> <td><?= $row['content']?></td> <td><?= $row['author']?></td> <td><?= $row['email']?></td> <td><a href="delete.php?id=<?= $row['id']?>">刪除</a></td> <td><a href="editform.php?id=<?= $row['id']?>">更新</a></td> </tr> <?php } ?> </table> <p>共有<?= mysql_num_rows($result) ?>條記錄 </p> <!-- mysql_num_rows（）函數返回的是結果集的總數 -->
<?php //釋放資源，關閉結果集 mysql_free_result($result); mysql_close($result); ?> </body> </html>
delete.php刪除程序
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 15:26:27 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 $id = intval($_GET['id']);//獲取5-6.php傳來的id參數並轉換為整型 $sql = "delete from `lyb1` where `id` = $id ";//刪除指定的內容 if (mysql_query($sql) && mysql_affected_rows()==1) {//執行sql語句並判斷執行是否成功 echo "<script>alert('刪除成功！');location.href='5.6.php'</script>"; }else{ echo "<script>alert('刪除失敗！');location.href='5.6.php'</script>"; } ?>
多選刪除頁面deleteall.php
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 15:10:04 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 if ($_GET["del"]==1) {//如果用戶按了“刪除”按鈕 $selectid=$_POST["selected"];//獲取所有選中多選框的值，保存到數組中 if( count($selectid)>0){//防止selectid值為空時執行SQL語句出錯 $sel = implode(",", $selectid);//將各個數組元素用“,”號連接起來 mysql_query("delete from `lyb1` where `id` in($sel)")or die("執行失敗".mysql_error()); header("Location:deleteall.php");//刪除完畢，刷新頁面 }else{ echo "沒有被選中的數據"; } } $result = mysql_query("select * from `lyb1`",$conn);//選擇數據庫表 ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <body> <form method="post" action="?del=1"> <!--表單提交給自身--> <a href="5.1.php">添加記錄</a> <table border="1"> <tr bgcolor="#ccc"> <th>序號</th> <th>標題</th> <th>內容</th> <th>作者</th> <th>郵箱</th> <th>刪除</th> <th>更新</th> </tr> <?php while ($row = mysql_fetch_assoc($result)) { ?> <tr> <td><?= $row['id']?></td> <td><?= $row['title']?></td> <td><?= $row['content']?></td> <td><?= $row['author']?></td> <td><?= $row['email']?></td> <td><input type="checkbox" name="selected[]" id="" value="<?= $row['id']?>"></td><!-- 刪除的復選框 --> <td><a href="editform.php?id=<?= $row['id']?>">更新</a></td> </tr> <?php } ?> <tr bgcolor="#ddd"> <td></td> <td></td> <td></td> <td></td> <td></td> <td><input type="submit" value="刪 除"></td><!-- 刪除按鈕 --> <td></td> </tr> </table> <p>共有<?= mysql_num_rows($result) ?>條記錄 </p> </form> <!-- mysql_num_rows（）函數返回的是結果集的總數 --> <?php //釋放資源，關閉結果集 mysql_free_result($result); mysql_close($result); ?> </body> </html>
更新頁面的代碼 editform.php
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 16:39:42 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 $id = intval($_GET['id']);//將獲取的id強制轉換為整型 $sql = "select * from `lyb1` where id = $id"; echo $sql; $result = mysql_query($sql,$conn);//選擇數據庫表 $row = mysql_fetch_assoc($result);//將待更新記錄各字段的值存入數組中 if ($_POST["submit"]) {//當單擊確認按鈕后執行更新語句 $title = $_POST['title']; $author = $_POST['author']; $content = $_POST['content']; $email = $_POST['email']; $sql_del = "Update `lyb1` Set title='$title',author='$author',email='$email',content='$content' Where id='$id'"; echo $sql_del; mysql_query($sql_del)or die("執行失敗".mysql_error()); echo "<script>alert('留言修改成功');location.href='5.6.php'</script>"; } ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>添加數據頁面</title> </head> <body> <form action="?id=<?= $row['id']?>" method="POST"> <p>添加新聞頁面</p> <div>標題:<input type="text" name="title" id="" value="<?= $row['title']?>"></div> <div>內容: <textarea name="content" id="" cols="30" rows="5"><?= $row['content']?></textarea></div> <div>作者:<input type="text" name="author" id="" value="<?= $row['author']?>"></div> <div>郵箱:<input type="text" name="email" id="" value="<?= $row['email']?>"></div> <div><input type="reset" value="重置"><input type="submit" name="submit" value="確定"></div> </form> </body> </html>
查詢記錄的實現search.php
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 17:31:16 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 $result = mysql_query("select * from `lyb1`",$conn); ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>查詢頁面</title> </head> <body> <form action="search_result.php" method="get"> <div style="border:1px solid gray; background:#eee;padding:4px;"> 查找留言：請輸入關鍵字 <input name="keyword" type="text"> <select name="sel"> <option value="title">文章標題</option> <option value="content">文章內容</option> </select> <input type="submit" name="submit" value="查詢"> </div> </form> <table border="1"> <tr bgcolor="#ccc"> <th>序號</th> <th>標題</th> <th>內容</th> <th>作者</th> <th>郵箱</th> <th>刪除</th> <th>更新</th> </tr> <?php while ($row = mysql_fetch_assoc($result)) { ?> <tr> <td><?= $row['id']?></td> <td><?= $row['title']?></td> <td><?= $row['content']?></td> <td><?= $row['author']?></td> <td><?= $row['email']?></td> <td><a href="delete.php?id=<?= $row['id']?>">刪除</a></td> <td><a href="editform.php?id=<?= $row['id']?>">更新</a></td> </tr> <?php } ?> </table> <p>共有<?= mysql_num_rows($result) ?>條記錄</p> </body> </html>
查詢結果的顯示頁面search_result.php
<?php /* * * @Authors peng--jun * @Email 1098325951@qq.com * @Date 2015-11-07 17:40:21 * @Link http://www.cnblogs.com/xs-yqz/ * @version $Id$ ========================================== */ header("Content-type: text/html; charset=UTF-8"); require("include/conn.php"); mysql_select_db("lyb",$conn);//選擇數據庫 $keyword=trim($_GET['keyword']);//獲取輸入的關鍵字 $sel=$_GET['sel'];//獲取選擇的查詢類型 $sql="select * from `lyb1`"; if ($keyword<>"") { $sql=$sql ." where $sel like '%$keyword%'"; //構造查詢語句 } $result=mysql_query($sql) or die('執行失敗'); if (mysql_num_rows($result)>0) { echo "<p>關鍵字為“ $keyword ”，共找到".mysql_num_rows($result)." 條留言</p>"; ?> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>查詢結果</title> </head> <body> <table border="1"> <tr bgcolor="#ccc"> <th>序號</th> <th>標題</th> <th>內容</th> <th>作者</th> <th>郵箱</th> <th>刪除</th> <th>更新</th> </tr> <?php while ($row = mysql_fetch_assoc($result)) { ?> <tr> <td><?= $row['id']?></td> <td><?= $row['title']?></td> <td><?= $row['content']?></td> <td><?= $row['author']?></td> <td><?= $row['email']?></td> <td><a href="delete.php?id=<?= $row['id']?>">刪除</a></td> <td><a href="editform.php?id=<?= $row['id']?>">更新</a></td> </tr> <?php } }else echo "沒有搜索到任何留言"; ?> </table> </body> </html>
至此，整個所有的操作都完成了。over！！！