在Laravel视图中调用未定义的函数

I have a About Us portion in my Laravel website home page. I have uploaded a huge article for About Us from admin panel which is shown in about us page. But I want to show a specific number of word for about us in home page and add read more after that. while click on read more it goes to about us page.

But I can't show specific number of words from that article in my home page.

I have use echo word_teaser_end($about_us[0]->details, 10); function but it gives error

Call to undefined function word_teaser_end() (View: E:\xampp\htdocs\OFFICE\SEN_CARE\sencare.com.bdesources\views\frontend\home\home.blade.php)

What should I do now ?

I don't know about the word_teaser_end() as it's define function, Try str_limit() helper function which can help you to load the number of words from string

{{ str_limit($string,'10') }}

https://laravel.com/docs/5.6/helpers#method-str-limit