正则表达式：删除所有额外的空格，换行符和空格

Question

Update: It seems like it is just a regex problem.

I am trying to remove all extra whitespace, line-breaks, and empty spaces from user story with a function to grab only 100 characters

Issue is although 100 character limit works, the removing of whitespace, linebreaks and empty spaces does not apply:

function aboutme_echo($x, $length)
{ 
    if(strlen($x) <= $length) 
    { 
        echo $x; 
    }
    else
    {
        $y = substr($x,0,$length) . '...'; 
        echo $y; 
    } 
}

aboutme_echo((preg_replace("/\s+/"," ", $aboutme)), 100);

Example String:

Answer 1

Something like this maybe?

function cleanExcerpt($string) {
   $pattern = '/\s+/';
   $replace = ' ';
   $cleanstring = trim(preg_replace($pattern,$replace,$string));
   return strtok(wordwrap($cleanstring, 100, "...
"), "
");
}

To use, you must pass through a string and echo the function like this:

$string = "Example String: