利用自定义标签，实现select下拉列表默认选中
//创建块函数方法，用于替换文本中的值
function smarty_block_get_cates($params, $content, &$_sm, &$repeat)
{
if (!$repeat) {
$ci = &get_instance();
$cates = $ci->db->get('category')->result_array();
$cates = get_data($cates);
$ss = $ci->db->list_fields('category');
$str = '';
foreach ($cates as $k => $v) {
$tmp = $content;
foreach ($ss as $key => $val) {
if ($val == 'ctype') {
if ($v[$val] == 0)
$v[$val] = '频道封面页';
if ($v[$val] == 1)
$v[$val] = '列表页';
if ($v[$val] == 2)
$v[$val] = '外链';
}
if (isset($params['val'])) {
if ($val == 'cname') {
if (trim($params['val']) != trim($v[$val])) {
$tmp = str_replace('selected', '', $tmp);
}
$v[$val] = str_repeat('---', $v['level'] * 2) . trim($v[$val]);
}
$tmp = str_replace("field." . $val, $v[$val], $tmp);
}
}
$str .= $tmp;
}
return $str;
}
}
function add_child()
{
$cid = $this->uri->segment(4);
$cate = $this->db->where('id', $cid)->get('category')->row_array(); //根据ID，获取需要被选中的选项名称
$this->_sm->assign('cate', $cate);
$this->_sm->display('category/add_child.html');
}
前端
<select class="form-select" aria-label="Default select example">
<option value="">顶级栏目</option>
{capture name='me'}
{$cate['cname']}
{/capture}
{get_cates val=$smarty.capture.me}
<option value="field.id" selected>field.cname</option>
{/get_cates}
</select>
