Question

我在用PHP代码编写的for循环中有3个下拉列表。

<?php
    for ($u=1;$u<=$slot;++$u){
        $y=$u-1;
        ++$uu;
        echo "PR: <SELECT  name='prog[$uu]' id='prog{$uu}'><option></option>";
        $az1=mysql_query("select distinct Programme from details");
        while ($az2=mysql_fetch_array($az1)){
            echo "<option >$az2[Programme]</option>";
        }
        echo "</select>";
        echo "CR: <SELECT name='course[$uu]' id='course{$uu}' ><option></option>";
        $az1=mysql_query("select distinct Course from details order by Course");
        while ($az2=mysql_fetch_array($az1))
        {
            echo "<option >$az2[Course]</option>";
        }
        echo "</select>&emsp;";
        echo "CO: <SELECT name='counsellor[$uu]' id='counsellor{$uu}' ><option></option>";
        $az1a=mysql_query("select  distinct Counsellor from counsellor");
        while ($az2a=mysql_fetch_array($az1a)){ 
            echo "<option >$az2a[Counsellor]</option>";
        }
        echo "</select>";
    }
?>

我想让它们依赖，以便CR取决于PR和CO取决于CR。

请帮帮我。

我对for循环感到困惑。在没有for循环的情况下，我使用了

<script type="text/javascript">
 $(function(){
 var $cat6 = $("#cat6"),
 $subcat6 = $("#subcat6");  
 $cat6.on("change",function(){
     var _rel = $(this).val();
     $subcat6.find("option").attr("style","");
      $subcat6.val("");
      if(!_rel) return $subcat6.prop("disabled",true);
      $subcat6.find("[rel="+_rel+"]").show();
       $subcat6.prop("disabled",false);
 });
});


  $(function(){
  var $cat6 = $("#cat6"),
  $subcat7 = $("#subcat7");  

  $cat6.on("change",function(){
      var _rel = $(this).val();
      $subcat7.find("option").attr("style","");
      $subcat7.val("");
      if(!_rel) return $subcat7.prop("disabled",true);
      $subcat7.find("[rel="+_rel+"]").show();
      $subcat7.prop("disabled",false);
 });
});
 </script>  

 </head>
 </html>
 <?php
  echo "<form action='sc4b.php' method='post' target='_blank'>";


  echo "PROGRAMME: <SELECT  name='prog'  id='cat6' required><option>
            </option>
           <OPTGROUP LABEL='Bachelor Degree Programme'>
          <option>BDP</option><option>BSW</option><option>BCA</option>
          <option>BTS</option>
        </OPTGROUP>
   <OPTGROUP LABEL='Master Degree Programme'>
   <option>MEG</option><option>MPS</option><option>MAEDU</option>
     <option>M.Com</option>
    <option>MAPY</option><option>MAH</option><option>MSW</option>
    <option>MEC</option>
    <option>MARD</option><option>MSO</option>
    </OPTGROUP></select>";

   echo "COURSE: <SELECT name='course' id='subcat6'   required><option>
   </option>";
   $az1=mysql_query("select * from details");
    while ($az2=mysql_fetch_array($az1))
       {
         echo "<option rel='$az2[Programme]'>$az2[Course]</option>";

       }
   echo "</select>";

   echo "COUNSELLOR: <SELECT name='counsellor' id='subcat7'   required>
   <option></option> ";
   $az1a=mysql_query("select * from counsellor");
   while ($az2a=mysql_fetch_array($az1a))
    {
    echo "<option rel='$az2a[Programme]'>$az2a[Counsellor]</option>";
    }
    echo "</select>";

我想知道如何修改此代码，以便解决for循环问题。没有for循环名称和id是以下形式

name='name'  id='id'

但在for循环中它是

name='name[$i]'  id='id{$i}'

我很困惑如何在jquery脚本中包含$i。

for循环中的依赖下拉列表

0 个答案: