我有一个AJAX应用程序的以下部分,它没有错误,但屏幕上也没有显示任何内容,所以我不确定问题所在.直接从具有？cmd&id = 1的浏览器调用此页面应该返回,或者甚至在没有？cmd的情况下调用它应该返回cmd错误消息.

编辑:添加测试用例:我确实得到了cmd错误消息,但是当我传递&id = 1(1是一个有效的id)时,没有返回任何html,查看源是完全空白的.我是否错误地使用了回声或类似的东西？

edit2:将echo添加为第一行:无法看到第一个echo

edit3:在回到旧版本并再次进行所有更改之后,我现在在使用有效的cmd和id参数调用时获得测试字符集输出.我使用的代码与下面粘贴的代码相同.

代码:

query("SET NAMES 'utf8'"); 
$con->set_charset("utf8"));
echo "test charset";

if($cmd=="GetSALEData")
{
  echo "test cmdifloop";

  if ($getRecords = $con->prepare("SELECT * FROM SALES WHERE PRODUCT_NO = ?"))
  {
    echo "test recordifloop";

    $getHtml = $con->prepare("SELECT PRODUCT_DESC FROM SALES WHERE PRODUCT_NO = ?");
    $getHtml->bind_param("s", $id);
    $getHtml->execute();
    $getHtml->bind_result($PRODUCT_DESC);

    $getRecords->bind_param("s", $id);
    $getRecords->execute(); 
    $getRecords->bind_result($PRODUCT_NO, $PRODUCT_NAME, $SUBTITLE, $CURRENT_PRICE, $START_PRICE,
                             $PRICE_COUNT, $QUANT_TOTAL, $QUANT_SOLD, $ACCESSSTARTS, $ACCESSENDS,
                             $ACCESSORIGIN_END, $USERNAME, $BEST_PRICEDER_ID, $FINISHED, $WATCH,
                             $BUYITNOW_PRICE, $PIC_URL, $PRIVATE_SALE, $SALE_TYPE, $ACCESSINSERT_DATE,
                             $ACCESSUPDATE_DATE, $CAT_DESC, $CAT_PATH, $COUNTRYCODE, $LOCATION,
                             $CONDITIONS, $REVISED, $PAYPAL_ACCEPT, $PRE_TERMINATED, $SHIPPING_TO,
                             $FEE_INSERTION, $FEE_FINAL, $FEE_LISTING, $PIC_XXL, $PIC_DIASHOW,
                             $PIC_COUNT, $ITEM_SITE_ID
                            ); 
    while ($getRecords->fetch()) 
    {
      $ccodes = array(  "1" => "USA",
                       "77" => "Germany",
                       "16" => "Austria",
                      "122" => "Luxemburg",
                      "193" => "Switzerland",
                     );

      $conditions = array( "0" => "USA",
                          "77" => "Germany",
                          "16" => "Austria",
                         );

      $country = $ccodes[$COUNTRYCODE];
      if ( $country == "" ) $country = "Not applicable";

      $columns = array('FINISHED', 'WATCH', 'PRIVATE_SALE', 'REVISED', 'PAYPAL_ACCEPT', 'PRE_TERMINATED', 'PIC_XXL', 'PIC_DIASHOW');

      foreach($columns as $column) {
        $$column = $row[$column] ? 'YES' : 'NO';
      }

      imageResize($PIC_URL, 250, 300);
      file_put_contents($id, file_get_contents($PIC_URL));

      $html = htmlentities(json_encode($PRODUCT_DESC));
      $shortDate = strftime("%d %m %Y", strtotime($ACCESSSTARTS));

      echo "
".$PRODUCT_NAME."

Username: ".$USERNAME."
PRODUCT Number: ".$PRODUCT_NO."
Subtitle: ".$SUBTITLE."
SALE Start: ".$ACCESSSTARTS." 
SALE End: ".$ACCESSENDS."
SALE Type: ".$SALE_TYPE."
Category: ".$CAT_DESC."


  
Condition:  ".$CURRENT_PRICE."
  
Total Items:  ".$QUANT_TOTAL."
  
Total Sales:  ".$QUANT_SOLD."
  
Start Price: € ".$START_PRICE."
  
Buyitnow Price: € ".$BUYITNOW_PRICE."
  
PRICEs:  ".$PRICE_COUNT." 
  
Revised:  ".$REVISED."


  
Private:  ".$PRIVATE_SALE."
  
Finished:  ".$FINISHED."
  
Cancelled:  ".$PRE_TERMINATED."
  
Paypal:  ".$PAYPAL_ACCEPT."
  
Country:  ". $country ."
  
Location:  ".$LOCATION."
  
Shipping to:  ". $country ."


 
 
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