如何顯示來自mySQL數據庫的兩個獨立表的值？

Question

我想使用foreach循環查看來自兩個單獨表格的值。在用戶選擇「啓動學期」，並從下拉列表中選擇「結束學期」，並且這兩個學期被存儲到一個數組名爲$ semesterarray

<table style='width: 75%; text-align: left;' cellpadding = '4'> 
<tr bgcolor=#000090> 
<th><FONT COLOR = #FFFFFF><b><?php echo $startsem ?></b></th> 
<th><FONT COLOR = #FFFFFF><b><?php echo $endsem ?></b></th> 
</tr> 

// If $semesterarray contains 10 and 11, I want to be able to view the 
// courses taken in the 10 semester and the 11 semester under two separate columns. 

<?php 
function getSemesterDetails($semester) 
{ 
    $output = ""; 
    $semA = $semester."reg"; 
    $query = "SELECT course1,course2,course3 FROM $semA"; 
    $result = mysql_query($query) or die(mysql_error()); 

    while ($row = mysql_fetch_array($result)) 
    { 

      // row displays: [course1]=> [course2]=> [course3]=> 

      // Add semester code to array Keys to indicate proper semester 
      // [course1.11]=> [course2.11]=> [course3.11]=> 

      foreach ($row as $key => $value) 
      { 
       $row[$key.".".$semester] = $value; 
       unset($row[$key]); 
      } 

     $startcourse1 = $row['course1.'.$semester]; 
     $startcourse2 = $row['course2.'.$semester]; 
     $startcourse3 = $row['course3.'.$semester]; 
     $startcoursesarray = array($startcourse1, $startcourse2, $startcourse3); 
     $startcourses = implode("<br>", $startcoursesarray); 

     $endcourse1 = $row['course1.'.$semester]; 
     $endcourse2 = $row['course2.'.$semester]; 
     $endcourse3 = $row['course3.'.$semester]; 
     $endcoursesarray = array($endcourse1, $endcourse2, $endcourse3); 
     $endcourses = implode("<br>", $endcoursesarray); 

     echo "<tr bgcolor=#ABB5F6> 
     <td>$startcourses</td> 
     <td>$endcourses</td> 
     </tr>"; 
    } 
} 

foreach ($midsemarrayA as $key => $semester) 
{ 
echo getSemesterDetails($semA); 
} 

?> 

任何想法？

Answer 1

這應該足以爲您作出一個開始：

function getSemesterDetails ($semester) { 
    $output = ""; 

    $query = "SELECT course1,course2,course3 FROM $semester"; 
    $result = mysql_query($query) or die(mysql_error()); 

    while ($row = mysql_fetch_array($result)) { 
      // row displays: [course1]=> [course2]=> [course3]=> 

      // Add semester code to array Keys to indicate proper semester 
      // [course1.11]=> [course2.11]=> [course3.11]=> 

      foreach ($row as $key => $value) { 
       $row[$key.".".$semester] = $value; 
       unset($row[$key]); 
      } 

     $startcourse1 = $row['course1.'.$semester]; 
     $startcourse2 = $row['course2.'.$semester]; 
     $startcourse3 = $row['course3.'.$semester]; 
     $startcoursesarray = array($startcourse1, $startcourse2, $startcourse3); 
     $startcourses = implode("<br>", $startcoursesarray); 

     $endcourse1 = $row['course1.'.$semester]; 
     $endcourse2 = $row['course2.'.$semester]; 
     $endcourse3 = $row['course3.'.$semester]; 
     $endcoursesarray = array($endcourse1, $endcourse2, $endcourse3); 
     $endcourses = implode("<br>", $endcoursesarray); 

     $output .= "<tr bgcolor=#ABB5F6> 
     <td>$startcourses</td> 
     <td>$endcourses</td> 
     </tr>"; 
    } 

return $output; 
} 

foreach ($semesterarray as $key => $semester) { 
    getSemesterDetails($semester); 
} 

你要得到它的返回值的數組，而不是字符串，但它移位到一個子程序應該做的伎倆。