Yii2 Softdelete trait (trait better than behavior)

SoftDeleteTrait.php

<?php

trait SoftDeleteTrait 
{
    public static function deletedProperties()
    {
        return ['deleted_at' => time()];
    }

    public static function deleteAll($condition = '', $params = [])
    {
        $command = static::getDb()->createCommand();
        $command->update(static::tableName(), static::deletedProperties(), $condition, $params);

        return $command->execute();
    }
}

usage.php

<?php

class User extends ActiveRecord
{
    use SoftDeleteTrait;

    public static function deletedProperties() // we can override deleted properties
    {
        return ['deleted' => 1];
    }
}