echo $ex_traffing;//这里输出看看,如果没有值,那就说明这个变量已经在这一行之前就丢失了
print "<td>
<select name=\"ex_traffing_text\">
<option value=$ex_traffing selected=\"selected\"></option>
<option value=\"Motorcycle\">Motorcycle</option>
</select>
</td>"; <option value=\"ceshi:".$ex_traffing."\" selected=\"selected\"></option>
这样才是。
print "<td>
<select name=\"ex_traffing_text\">
<option value=$ex_traffing selected=\"selected\"></option>
<option value=\"Motorcycle\">Motorcycle</option>
</select>
</td>"; <option value=\"ceshi:".$ex_traffing."\" selected=\"selected\"></option>
这样才是。
是否此问题
<select name="ex_traffing_text">
<option value=bus selected="selected"></option>
<option value="Motorcycle">Motorcycle</option>
</select>
</td>
有值的哦