PHP变量不显示值

Question

我将MySQL Query值存储在PHP变量中,但它不显示数据.PS:数据在MySQL表格列中可用.

 <?php 
$cmsca= mysql_query("SELECT SUM(qa_effort) FROM tbl_uat WHERE product='CAP'");
     while ($cresulta = mysql_fetch_array ($cmsca)) 
         $arra[0] = $cresulta[0];
         echo $arra[0];
?>

我没有线索,上面的代码有什么问题？需要帮忙!

问候

Answer 1

试试这个

   <?php 
  $cmsca= mysql_query("SELECT SUM(qa_effort) as sums FROM tbl_uat WHERE product='CAP'");
   while ($cresulta = mysql_fetch_array($cmsca)) 
   {
     echo $cresulta['sums'];
   }
  ?>