php – 没有实际表单的CodeIgniter Form_Validation

if ($this->form_validation->run() == FALSE){
 //validation did not pass
}else{
 //validation did pass
}

我的规则是这样的：

$this->form_validation->set_rules('key','','trim|required'); //simplified

所以,我显然是通过AJAX向这个脚本发送数据

echo $_POST['key']; //prints valid value that is sent from AJAX

如何使用form_validation验证$_POST [‘key’]？

AJAX代码

$("#key-inputs .short,#key-inputs .long").change(function () {
        var key = $(this).val();
        var id = $(this).attr('name');
        var table = $(this).attr('class');
        var file = $('span .file').val();
        var data = 'NULL';
        $.post(file + "/edit",{
                        id:id,key:key,file:file,table:table},function(code,textStatus) {
                        data = code;
        });
        $(this).ajaxStop(function(){
            if (data == 3) $(this).parent().fadeOut('slow',function() {}); //delete
            if (data == 2) $(this).fadeOut(200).fadeIn(200); //update
            if (data == 5) alert('not valid'); //update parameter is not valid input (depends on set_value rules)
            //writeConsole(previous.val().outerHTML);
        });
    });

PHP代码//简化

if (!$this->input->is_ajax_request()) redirect('lang/translate/keys/'.$param);
          //do work here
         if ($key == "") {
          //delete key
            $this->lang_translate_model->DeleteKey($id,$table);
            echo 3;
            return TRUE;
         }
         $this->form_validation->set_rules('key','key','trim|required|max_length[56]|xss_clean|unique_file[lang_key:'.$param.']');
         if ($this->form_validation->run() == FALSE){
          //validation did not pass
          echo 5;
        }

所以我有一些(生成的)输入,如果..set_rules通过,我想在DB中进行更新.
如果输入为空它会删除自己(这很好)
解
TRUE / FALSE表是here

if ($this->form_validation->required($key)){
          //validation did not pass
          echo 5;
}

如果有参数传递,例如min_length [2];

$this->form_validation->min_length($key,'2');