yii\bootstrap\Modal 禁止点击遮罩层关闭弹框

// 模态框
Modal::begin([
    'id' => 'form-modal',
    'header' => '<h4 class="modal-title">弹框title</h4>',
    'footer' => null,
    'size' => Modal::SIZE_LARGE,
    'options'=>[
        'data-backdrop'=>'static',//点击空白处不关闭弹窗
        'data-keyboard'=>false,
    ],
]);
Modal::end();