在yii2验证之前执行一些额外自定义验证

<?php $form = ActiveForm::begin([
    'id'     => $model->formName(),
    'action' => ['/apitools/default/index']
]); ?>

第一种

<?php
$js = <<<JS
$("#button").click(function(e){

    if(验证规则){
        $("form#{$model->formName()}").submit();
    }else{
        return false;
    }

})
JS;
$this->registerJs($js);

第二种

<?php
/**
 * User: yiqing
 * Date: 14-9-15
 * Time: 下午12:09
 */

namespace common\widgets;

use yii\web\View ;
use yii\widgets\Block ;

class JsBlock extends Block{

    /**
     * @var null
     */
    public $key = null;
    /**
     * @var int
     */
    public $pos = View::POS_END ;
    /**
     * Ends recording a block.
     * This method stops output buffering and saves the rendering result as a named block in the view.
     */
    public function run()
    {
        $block = ob_get_clean();
        if ($this->renderInPlace) {
           throw new \Exception("not implemented yet ! ");
           // echo $block;
        }
        $block = trim($block) ;
        /*
        $jsBlockPattern  = '|^<script[^>]*>(.+?)</script>$|is';
        if(preg_match($jsBlockPattern,$block)){
            $block =  preg_replace ( $jsBlockPattern , '${1}'  , $block );
        }
        */
        $jsBlockPattern  = '|^<script[^>]*>(?P<block_content>.+?)</script>$|is';
        if(preg_match($jsBlockPattern,$block,$matches)){
            $block =  $matches['block_content'];
        }

        $this->view->registerJs($block, $this->pos,$this->key) ;
    }
}

<?php JsBlock::begin() ?>
    <script>
        $(function () {
            jQuery('form#apitool').on('beforeValidate', function (e) {
                if(验证规则){
                    //不用执行什么操作,自动会提交
                }else{
                    return false;
                }
            });
    </script>
<?php JsBlock::end() ?>