具有多个值的动态下拉框的预选值 [英] pre-selected values for a dynamic drop-down box with multiple values

问题描述

我正在尝试在多个下拉菜单中预先选择我的编辑页面上的值，因此一旦用户单击编辑"，就可以看到已经插入的值.值以逗号分隔的形式保存在MySQL中，例如"1、2、3、4、5"

I am trying to pre select values on my edit page in multiple drop down so once user click edit, can see already inserted values. Values are saved as comma separated in MySQL like "1,2,3,4,5"

尝试此解决方案但不起作用:(，是否可以通过任何方式预先选择这些价位?请帮助

trying this solution but doesn't work :( , is there is any way that those vales will be pre selected? Please help

<select name="w_owning_branches[]" size="10" id="w_owning_branches" multiple="multiple" required>
<option value="" class="dropdown-option">  Select Owning Branch  </option>
<?php do {

$value = $row_branches['branch_id'];
$name = $row_branches['name'];
$selected = '1,2,3,4,5,6';

echo "<option value='$value'".(($selected == '$value') ? " selected='selected'":"").">$name</option>";


} while ($row_branches = mysql_fetch_assoc($branches)); ?>
</select>

推荐答案

尝试:

<select name="w_owning_branches[]" size="10" id="w_owning_branches" multiple="multiple" required>
<option value="" class="dropdown-option">  Select Owning Branch  </option>
<?php do {

$value = $row_branches['branch_id'];
$name = $row_branches['name'];
$selected = '1,2,3,4,5,6';
$selected_values = explode(",",$selected);

echo "<option value='$value'".((in_array($value,$selected_values)) ? " selected='selected'":"").">$name</option>";


} while ($row_branches = mysql_fetch_assoc($branches)); ?>
</select>

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