How to truncate variable in template Laravel 5.6?

i need your help to know how to truncate my variable in my template.

this is my code :

<p class="card-text"></p>

i would truncate this variable $new['content'] at 150 characters with '...' at end.

Can you help me please ?

I work on Laravel 5.6

Thanks all ^^

via Chebli Mohamed