將數據更新到 MySQL 數據庫-php教程-PHP中文網

將數據更新到 MySQL 數據庫

PHP中文网

發布： 2024-12-05 10:29:16

轉載

696 人瀏覽過

通過 PHP 函數 mysql_query 執行 SQL UPDATE 語句，可以將數據更新到 MySQL 表中。

下麵是一個將記錄更新到員工表中的簡單示例。要更新任何表中的記錄，需要找到該記錄使用條件子句進行記錄。下麵的示例使用主鍵匹配員工表中的記錄。

截屏2024-12-05 10.15.12.png

示例

嚐試以下示例來了解更新操作。您需要提供員工 ID 才能更新員工工資。

<html>
   
   <head>
      <title>Update a Record in MySQL Database</title>
   </head>
   
   <body>
      <?php         if(isset($_POST[&#39;update&#39;])) {
            $dbhost = &#39;localhost:3036&#39;;
            $dbuser = &#39;root&#39;;
            $dbpass = &#39;rootpassword&#39;;
            
            $conn = mysql_connect($dbhost, $dbuser, $dbpass);
            
            if(! $conn ) {
               die(&#39;Could not connect: &#39; . mysql_error());
            }
            
            $emp_id = $_POST[&#39;emp_id&#39;];
            $emp_salary = $_POST[&#39;emp_salary&#39;];
            
            $sql = "UPDATE employee ". "SET emp_salary = $emp_salary ". 
               "WHERE emp_id = $emp_id" ;
            mysql_select_db(&#39;test_db&#39;);
            $retval = mysql_query( $sql, $conn );
            
            if(! $retval ) {
               die(&#39;Could not update data: &#39; . mysql_error());
            }
            echo "Updated data successfullyn";
            
            mysql_close($conn);
         }else {
            ?>
               <form method = "post" action = "<?php $_PHP_SELF ?>">                  <table width = "400" border =" 0" cellspacing = "1" 
                     cellpadding = "2">
                  
                     <tr>
                        <td width = "100">Employee ID</td>
                        <td><input name = "emp_id" type = "text" 
                           id = "emp_id"></td>
                     </tr>
                  
                     <tr>
                        <td width = "100">Employee Salary</td>
                        <td><input name = "emp_salary" type = "text" 
                           id = "emp_salary"></td>
                     </tr>
                  
                     <tr>
                        <td width = "100"> </td>
                        <td> </td>
                     </tr>
                  
                     <tr>
                        <td width = "100"> </td>
                        <td>
                           <input name = "update" type = "submit" 
                              id = "update" value = "Update">
                        </td>
                     </tr>
                  
                  </table>
               </form>
            <?php         }
      ?>
      
   </body></html>

登入後複製

以上是將數據更新到 MySQL 數據庫的詳細內容。更多資訊請關注PHP中文網其他相關文章！