从数据库预选选项值

Question

我有一个包含select option输入的编辑表单，我想根据条件选择默认选项。那就是：

<select class="form-control locationid" id="locationid" name="locationid" required> 
    <option value="" disabled selected> Select branch</option> 
    <option data-id="0" value="0">NONE</option> 
     <?php foreach ($vendor as $v) { ?> 
    <option data-id="<?php echo $v['location_id']; ?>" value="<?php echo $v['location_id']?>" ><?php echo $v['name'] ;?></option> 
     <?php };?> 
</select> 

我的控制器：

$this->db->select("d.user_id as id, d.plate_number as plate_number, d.current_lat as lat, d.current_lon as lon, d.created_on as created_on, d.updated_on as updated_on, d.available as available, d.location_id as location_id, u.user_name as name, u.user_email as email, u.user_phone as phone, v.name as location_name"); 
     $this->db->from('user_driver as d'); 
     $this->db->join('user as u', 'd.user_id = u.user_id','left'); 
     $this->db->join('vendor_location as v', 'd.location_id = v.location_id','left'); 
     $query = $this->db->get(); 
     $data['driver'] = $query->result_array(); 

     $this->db->select("location_id, name"); 
     $this->db->from('vendor_location'); 
     $query2 = $this->db->get(); 
     $data['vendor'] = $query2->result_array(); 

的user_driver表包含location_id在vendor_location表相关location_id列列。我怎样才能使select option表显示现有location_id表中的user_driver表以及来自vendor_location表的选项？目前，上面的代码仅显示禁用选项Select branch。

Answer 1

您可以在一个单独的阵列使用in_array()用于获取选择的选项，但此店location_id从$data['driver']：

<?php 
// in your view file 
$location = array(); 
foreach ($driver as $value) { // getting from $data['driver'] 
    $location[] = $value['location_id']; // store all location_id in an array 
} 
?> 

不是使用in_array()的<option>里面像：

<?=(in_array($v['location_id'], $location) ? 'selected=""' : '')?> 

例如：

0从“选择分支”选项

可以将所有location_ids存储在一个数组变量

<select class="form-control locationid" id="locationid" name="locationid" required> 
    <option value="" disabled selected> Select branch</option> 
    <option data-id="0" value="0">NONE</option> 
    <?php foreach ($vendor as $v) { ?> 
    <option <?=(in_array($v['location_id'], $location) ? 'selected=""' : '')?> data-id="<?php echo $v['location_id']; ?>" value="<?php echo $v['location_id']?>" ><?php echo $v['name'] ;?></option> 
    <?php };?> 
</select> 

Answer 2

• 首先删除选定的属性（如： $ locations_ids）。
• 使用in_array在foreach中我们可以检查位置是否存在。

请参阅下面的代码 -

<select class="form-control locationid" id="locationid" name="locationid" required> 
 
    <option value="" disabled > Select branch</option> 
 
    <option data-id="0" value="0">NONE</option> 
 
     <?php foreach ($vendor as $v) { ?> 
 
    
 
    <option data-id="<?php echo $v['location_id']; ?>" value="<?php echo $v['location_id']?>" <?php echo in_array($v['location_id'], $locations_ids) ? 'selected' : ''; ><?php echo $v['name'] ;?></option> 
 
    
 
     <?php };?> 
 
</select>

您想根据什么选择默认值