dph87312 2017-08-24 04:16 采纳率: 100%
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使用PHP在Dropdown框中设置先前选择的值

So, what I'm trying to achieve that after the user hits submit, the dropdown retains the value that the user have chosen. This is my code for the dropdown, I understand that I have to selected = 'selected', but I couldn't figure out how it fits in my code.

if (mysqli_num_rows($result) > 0) {     // output data of each row
    while($row_branch = mysqli_fetch_array($result)) {
        $menu_branch .= "<option value='".$row_branch["0"]."'>" . 
        $row_branch["0"]. "</option>";
    }
} 
echo $menu_branch;
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  • douqiao7958 2017-08-24 04:21
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    if i understand right:

     // $yourvalue is previous dropdown value
    
    if (mysqli_num_rows($result) > 0) {
      // output data of each row
     while($row_branch = mysqli_fetch_array($result)) {
         if ($row_branch["0"] == $yourvalue)
             $selected = "selected";
         else 
             $selected = "";
         $menu_branch .= "<option value='".$row_branch["0"]."' $selected>" . 
         $row_branch["0"]. "</option>";
      }
    }
    
    echo $menu_branch;
    
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