wordpress - Php function limiting the amount of passed in characters -

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I have certain characters that I can fit in place, I want to display the category. So I was thinking that in a way I could limit the number of characters which can output this function.

I want to limit the output of this function: 

  & lt; Php the_category (',')? & Gt; Output: WordPress, Computers, Blogging

Something like this:

I'm new to PHP and WordPress, so a little guidance on how to run would be helpful.

Repeat the comment and question of Web Destory gives me suggestions: 

  echo substr_replace (the_category (',') 
 
," ... ", 14);

I originally suggested, which did not sort out.


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