php代碼來編輯和刪除當前行

Question

我已經在php中創建了一個代碼，顯示mysql數據庫中的記錄。現在我想通過我的網頁編輯和刪除dataabse中的行。如何在PHP中使用？我的數據庫表犯規包含id字段在數據庫

<?php 

mysql_connect("localhost","root","") or die(mysql_error()); 
mysql_select_db("newlog1") or die(mysql_error()); 
$key=mysql_query("select id from newregister1") or die(mysql_error()); 
$result=mysql_query("select * from newregister1 where id='$key'") or die(mysql_error()); 

echo "<table border='1'>"; 
echo "<tr><th>NAME</th><th>EMAILID</th><th>ADDRESS</th><th>CONTACT</th><th>STATE</th><th>CITY</th><th>EDIT</th></tr>"; 

while($row=mysql_fetch_array($result)) { 
    echo "<tr><td>"; 
    echo $row['name']; 
    echo "</td><td>"; 
    echo $row['emailid']; 
    echo "</td><td>"; 
    echo $row['address']; 
    echo "</td><td>"; 
    echo $row['contact']; 
    echo "</td><td>"; 
    echo $row['state']; 
    echo "</td><td>"; 
    echo $row['city']; 
    echo "</td><td>"; 
    echo "Edit"; 
    echo "</td><td>"; 
    echo "Delete"; 
    echo "</td></tr>" 
} 
echo "</table>"; 

?> 

Answer 1

更新一行SQL查詢UPDATE：UPDATE users SET name = 'new_name' WHERE id = '5'MySQL update

刪除行與另一個SQL查詢 - 刪除：DELETE FROM users WHERE id = '5'MySQL delete

Answer 2

首先你不應該使用舊的mysql_ *功能，但我不會進入，因爲它代表你有SQL注入。

最簡單的方法是爲您希望頁面製作的每個動作創建一個模型，添加編輯刪除等，然後讓控制器處理調用哪個方法。 爲了簡單起見，我使用了一個基於$_GET['do']參數的開關。

然後，依賴於交換機的哪個部分正在運行，將調用模型中的不同方法。

<?php 
//Open a connection to the db 
try { 
    $db = new PDO("mysql:host=localhost;dbname=newlog1", 'root', 'yourPW'); 
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 
    $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); 
}catch (Exception $e){ 
    die('Cannot connect to mySQL server.'); 
} 

/** 
* The contacts model 
*/ 
class contacts_object{ 

    //Pass the db connection to this class 
    function __construct(PDO $db){ 
     $this->db = $db; 
    } 

    function fetch_all(){ 
     $sql = 'SELECT * FROM newregister1'; 
     $statement = $this->db->prepare($sql); 
     $statement->execute(); 
     return $statement->fetchAll(PDO::FETCH_ASSOC); 
    } 
    function fetch_by_id($id){ 
     $sql = 'SELECT * FROM newregister1 WHERE id=:id'; 
     $statement = $this->db->prepare($sql); 
     $statement->bindParam(':id', $this->user, PDO::PARAM_INT); 
     $statement->execute(); 
     return $statement->fetch(PDO::FETCH_ASSOC); 
    } 

    function add($data){ 
     $sql = 'INSERT into newregister1 (name, emailid, address, contact, state, city) 
            VALUES (:name, :emailid, :address, :contact, :state, :city)'; 
     $statement = $this->db->prepare($sql); 
     $statement->bindParam(':name', $data['name'], PDO::PARAM_STR); 
     $statement->bindParam(':emailid', $data['emailid'], PDO::PARAM_STR); 
     $statement->bindParam(':address', $data['address'], PDO::PARAM_STR); 
     $statement->bindParam(':contact', $data['contact'], PDO::PARAM_STR); 
     $statement->bindParam(':state', $data['state'], PDO::PARAM_STR); 
     $statement->bindParam(':city', $data['city'], PDO::PARAM_STR); 
     $statement->execute(); 
    } 
    function update($data, $id){ 
     $sql = 'UPDATE newregister1 SET name=:name, emailid=:emailid, address=:address, contact=:contact, state=:state, city=:city 
       WHERE id=:id'; 
     $statement = $this->db->prepare($sql); 
     $statement->bindParam(':id',  $id, PDO::PARAM_INT); 
     $statement->bindParam(':name', $data['name'], PDO::PARAM_STR); 
     $statement->bindParam(':emailid', $data['emailid'], PDO::PARAM_STR); 
     $statement->bindParam(':address', $data['address'], PDO::PARAM_STR); 
     $statement->bindParam(':contact', $data['contact'], PDO::PARAM_STR); 
     $statement->bindParam(':state', $data['state'], PDO::PARAM_STR); 
     $statement->bindParam(':city', $data['city'], PDO::PARAM_STR); 
     $statement->execute(); 
    } 

    function delete($id){ 
     $sql = 'DELETE FROM newregister1 WHERE id=:id'; 
     $statement = $this->db->prepare($sql); 
     $statement->bindParam(':id', $this->user, PDO::PARAM_INT); 
     $statement->execute(); 
    } 
} 


//Example usage 
$contact = new contacts_object($db); 

//URL: http://example.com/admin/?do=add 
$do = null; 
if(isset($_GET['do'])){ 
    $do = $_GET['do']; 
} 

switch($do){ 
    case "add": 
     if($_SERVER['REQUEST_METHOD']=='POST'){ 
      //Do some validation 
      if(name, emailid, address, contact, state, city are set){ 
       $data = array('name'=>$_POST['name'], 
           'emailid'=>$_POST['emailid'], 
           'address'=>$_POST['address'], 
           'contact'=>$_POST['contact'], 
           'state'=>$_POST['state'], 
           'city'=>$_POST['name']); 
       $contact->add($data); 
      }   
     } 

     //Echo your add form ect 
     break; 
    case "edit": 
     //EG:http://example.com/admin/?do=edit&id=13 
     if(!empty($_GET['id']) && is_numeric($_GET['id'])){ 
      $result = $contact->fetch_by_id($_GET['id']); 
     }else{ 
      exit(header('Location: http://example.com/admin/')); 
     } 

     //Handle the update  
     if($_SERVER['REQUEST_METHOD']=='POST'){ 
      //Do some validation eg 
      if(name, emailid, address, contact, state, city are set){ 
       $data = array('name'=>$_POST['name'], 
           'emailid'=>$_POST['emailid'], 
           'address'=>$_POST['address'], 
           'contact'=>$_POST['contact'], 
           'state'=>$_POST['state'], 
           'city'=>$_POST['name']); 
       $contact->update($data, $_POST['id']); 
      }   
     } 

     //Echo your edit form ect and loop through the $result Array 
     break; 

    case "delete": 
     //EG:http://example.com/admin/?do=delete&id=13 
     if(!empty($_GET['id']) && is_numeric($_GET['id'])){ 
      $contact->delete($_GET['id']); 
      exit(header('Location: http://example.com')); 
     } 
     break; 

    default: 
    //EG http://example.com/admin/ 
    $result = $contact->fetch_all(); 
    //Echo your front page act and loop through the $result Array for all contacts 
    break; 
} 
?> 

希望它能幫助，它不是一個最終的劇本只是一個例子...