Yii2 - search params with link - search

Question

i need implement a search by attribute “year”, but i need this in links (ex. when i click in link “2017”, $dataProvider return only records with “year” = “2017”), in index..php i have:
<div class="y-index">
<?php echo $this->render('_search', ['model' => $searchModel]); ?>
<p>
<?= Html::a(Yii::t('app', 'Create Oficios Apqe'), ['create'], ['class' => 'btn btn-success']) ?>
</p>
<?php Pjax::begin(); ?> <?= GridView::widget([
'dataProvider' => $dataProvider,
//'filterModel' => $searchModel,
'columns' => [
'id',
'name',
'minuta',
'year',
['class' => 'yii\grid\ActionColumn'],
],
]); ?>
<?php Pjax::end(); ?>
</div>
_search.php
<div class="y-search">
<?php $form = ActiveForm::begin([
'action' => ['index'],
'method' => 'get',
]); ?>
<?= $form->field($model, 'id') ?>
<?= $form->field($model, 'name') ?>
<?= $form->field($model, 'minuta') ?>
<?= Html::a('2019', ['index', 'year' => '2019'], ['class' => 'year label label-efault', 'id' => '2019']) ; ?>
<?= Html::a('2018', ['index', 'year' => '2018'], ['class' => 'year label label-default', 'id' => '2018']) ; ?>
<?= Html::a('2017', ['index', 'year' => '2017'], ['class' => 'year label label-default', 'id' => '2017']) ; ?>
<div class="form-group">
<?= Html::submitButton(Yii::t('app', 'Search'), ['class' => 'btn btn-primary']) ?>
<?= Html::a(Yii::t('app', 'Reset'), [Yii::$app->controller->action->id], ['class' => 'btn btn-default']) ?>
</div>
<?php ActiveForm::end(); ?>
</div>
basically i need the example with site from yii:
when i click in left menu in "Tutorial" option the link is set "https://www.yiiframework.com/wiki?category=3&version=2.0";
and after when i click in me menu "AJAX", the link is append and set to "https://www.yiiframework.com/wiki?tag=ajax&category=3&version=2.0";
basiclly i need search form param "year" with link, and with concatenate params from form "_search.php".

Answer 1

You can pass an array as the second parameter.
Html::a() uses yii\helpers\Url::to() on the background to create the link, docs. You can use any parameters that you want passing them as an array.
Html::a(
'2017',
['', 'year' => '2017'],
['class' => 'year label label-default', 'id' => '2017']
) ;

Answer 2

You just need to remove the action from the _search.php form it would submit to the current action automatically, and it would append the current query string with the new search parameters passed from the form.
Just change the
<?php $form = ActiveForm::begin([
'action' => ['index'],
'method' => 'get',
]); ?>
to
<?php $form = ActiveForm::begin([
'method' => 'get',
]); ?>