How to add an ellipsis hyperlink after the first space beyond 170 characters?

Question

I have a long text like below:

$postText=\"It is a long established fact that a reader will be distracted by the readable content of a page when looking at its l         


        

Answer 1

Your regex .{170}\S*\s is fine but has a little problem. It doesn't guarantee if \S* matches rest of a word as it may match an MD5 - 170 characters up to first character of MD5 hash then matching 31 more characters which could be more than this.

You are treating those 170 characters as a delimiter of preg_split, hence you didn't have it in output.

Considering these two things in mind, you may come with a better idea:

$array = preg_split('~^[\s\S]{1,170}+(?(?!\S{10,})\S*)\K~', $string);

PHP live demo

10 ensures there is no non-whitespace characters more than that. If exists it splits right after 170 characters.

Accessing to $array[0] you could add your read more text to it.