Yii2针对指定url的生成及图片等的引入方法小结

// /index?r=site/index
echo Url::to(['site/index']);
// /index?r=site/index&src=ref1#name
echo Url::to(['site/index', 'src' => 'ref1', '#' => 'name']);
// the currently requested URL
echo Url::to();
// /images/logo.gif
echo Url::to('@web/images/logo.gif');
// images/logo.gif
echo Url::to('images/logo.gif');
// http://.example./images/logo.gif
echo Url::to('@web/images/logo.gif', true);
// https://.example./images/logo.gif
echo Url::to('@web/images/logo.gif', 'https');
// /index?r=site/index
echo Url::toRoute('site/index');
// /index?r=site/index&src=ref1#name
echo Url::toRoute(['site/index', 'src' => 'ref1', '#' => 'name']);
// http://.example./index.php?r=site/index
echo Url::toRoute('site/index', true);
// https://.example./index.php?r=site/index
echo Url::toRoute('site/index', 'https');
echo Yii::$app->urlManager->createUrl('site/index')