笨會話值覆蓋

Question

在我看來，我有以下代碼：

if (($news['newsvideo'] !="") || ($news['newsvideo'] != NULL)) { 

    $newdata4 = array(
    'tablename' => 'news', 
    'recordid'  => $news['newsid'], 
    'fieldname' => 'newsid', 
    'fieldToUpdate' => 'newsvideo', 
    'dpage' => 'news/editNews' 
    ); 

    $this->session->set_userdata($newdata4); 
    echo anchor('news/updateOneField', 'Delete Video?','class=btn'); 
} 

    if (($news['newsvideo_en'] !="") || ($news['newsvideo_en'] != NULL)) { 

    $newdata5 = array(
    'tablename' => 'news', 
    'recordid'  => $news['newsid'], 
    'fieldname' => 'newsid', 
    'fieldToUpdate' => 'newsvideo_en', 
    'dpage' => 'news/editNews' 
    ); 

    $this->session->set_userdata($newdata5); 
    echo anchor('news/updateOneField', 'Delete Video?','class=btn'); 
} 

功能在我的控制器如下：

public function updateOneField() 
    { 

     $tablename = $this->session->userdata('tablename'); 
     $id = $this->session->userdata('recordid'); 
     $fieldname = $this->session->userdata('fieldname'); 
     $fieldToUpdate = $this->session->userdata('fieldToUpdate'); 
     //$this->newsModel->save(array($fieldToUpdate => ''), $id);   
     //$newsid = $id; 

     echo "Table name: ". $tablename . "<br/>"; 
     echo "Id: " . $id. "<br/>"; 
     echo "Field name: " . $fieldname. "<br/>"; 
     echo "Field to update: " . $fieldToUpdate. "<br/>"; 
     die(); 
     // destroy the session after the update 
     $this->session->unset_userdata('tablename'); 
     $this->session->unset_userdata('recordid'); 
     $this->session->unset_userdata('fieldname'); 
     $this->session->unset_userdata('fieldToUpdate'); 

     $this->displayEditNewsForm($newsid); 
    } 

現在，如果我第一個鏈接我要上點擊刪除newsvideo，當試圖更新newsvideo字段時，newsvideo_en被更新。這意味着我稍後重寫數組的值。有沒有人有想法如何避免，並更新正確的領域？

問候，卓然

Answer 1

1）你爲什麼對空和空檢查？

if (($news['newsvideo_en'] !="") || ($news['newsvideo_en'] != NULL)) { 

你可能只使用

if ($news['newsvideo_en'] !=""){

，除非你的意思是檢查是否not empty和not null在這種情況下，你要

if (($news['newsvideo_en'] !="") AND ($news['newsvideo_en'] != NULL)) {

2）爲什麼在取消設置會話數據之前將腳本告訴die()？

echo "Table name: ". $tablename . "<br/>"; 
    echo "Id: " . $id. "<br/>"; 
    echo "Field name: " . $fieldname. "<br/>"; 
    echo "Field to update: " . $fieldToUpdate. "<br/>"; 
    die();//anything below here WILL NOT RUN 
    // destroy the session after the update 

    //this code will never run... 
    $this->session->unset_userdata('tablename'); 
    $this->session->unset_userdata('recordid'); 
    $this->session->unset_userdata('fieldname'); 
    $this->session->unset_userdata('fieldToUpdate'); 

因爲腳本曾經到達unset_userdata代碼之前死亡的，未設置從不運行。如果您想清除會話數據，則必須清除die()。

3）爲什麼不使用POST？

echo form_open("video_edit"); 

if ($news['newsvideo'] !="") { 
    echo form_hidden('fieldToUpdate','newvideo'); 
} 
if ($news['newsvideo_en'] !="") { 
    echo form_hidden('fieldToUpdate','newvideo_en'); 
} 
echo form_hidden("tablename","news"); 
echo form_hidden("recordid",$news['newsid']); 
echo form_hidden("fieldname","newsid"); 
echo form_hidden("dpage","news/editNews"); 

echo anchor("news/updateOneField", "Delete Video?","class=btn"); 

echo form_close();