tokenizing a string with max line length

Hi, I would like to tokenize a string on word boundary with maximum line length of 80 characters. For some reason this does not work:

<?php


 function tokenTruncate($string) {
	  $matches = array();
      preg_match("/^(.{1,80})[\s]/i", $string, $matches);
 	return $matches;
}


$str = "aaaaaaaa aaaaaa aaaaaaaaa aaaaaa aaaaaa aaaaaaaa aaaaaa aaaaaaaaa aaaaaa aaaaaaa aaaaaa aaaaaaaa
bbbbbb bbbbbb bbbbbbb bbbbb bbbbbb bbbb bbbbb bbbb bbbbbbb bbbbbb bbbbb bbbbbbb bbbbbb bbbbbb bbbbb bbbbbbbb
ccccc cccccc cccccc cccccc ccccccc ccccc  cccccc cccccc ccccccc cccccccc ccccc cccccc ccccccc ccccccc
ddddd ddddddd ddddddd dddddd ddddddd  dddddd dddddd dddddd ddddd ddddddd dddd dddd ddddddddddddddd ";

  $tokens = array();
  $tokens  = tokenTruncate($str);

  print_r($tokens);
?>

Open in new window

RozamundaAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

gr8gonzoConsultantCommented:
Have you tried wordwrap() ?

<?php
$str = "aaaaaaaa aaaaaa aaaaaaaaa aaaaaa aaaaaa aaaaaaaa aaaaaa aaaaaaaaa aaaaaa aaaaaaa aaaaaa aaaaaaaa bbbbbb bbbbbb bbbbbbb bbbbb bbbbbb bbbb bbbbb bbbb bbbbbbb bbbbbb bbbbb bbbbbbb bbbbbb bbbbbb bbbbb bbbbbbbb ccccc cccccc cccccc cccccc ccccccc ccccc  cccccc cccccc ccccccc cccccccc ccccc cccccc ccccccc ccccccc ddddd ddddddd ddddddd dddddd ddddddd  dddddd dddddd dddddd ddddd ddddddd dddd dddd ddddddddddddddd ";

$tokens = explode("\n",wordwrap($str));

?>
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Ray PaseurCommented:
It sort of sounds like what you want is called a "teaser fragment" (a publishing term of art).  But the "tokenize" throws me off a bit.  See if this makes sense.
<?php // RAY_teaser_fragment.php
error_reporting(E_ALL);


// CREATE A TEASER FRAGMENT HEADLINE
// RETURN FIRST FEW WHOLE WORDS FOLLOWED BY ELLIPSES
// WITH A LINK TO THE FULL ARTICLE
// $length IS MINIMUM TRUNCATION CHARACTER COUNT


function teaser_fragment($text, $length=32, $url='#', $delim='|||')
{
    // IF TRUNCATION IS NEEDED
    if (strlen($text) > $length)
    {
        // IF TRUNCATION IS NEEDED, BREAK STRING APART
        $t = wordwrap($text, $length, $delim);
        $a = explode($delim, $t);
        $z = '...';
    }
    // IF TRUNCATION IS NOT NEEDED
    else
    {
        $a[0] = $text;
        $z = NULL;
    }

    // CONSTRUCT THE FRAGMENT WITH THE LINK AND ADD ELLIPSIS (LINK) TO THE END
    $teaser
    = '<a target="_blank" href="'
    . $url
    . '">'
    . $a[0]
    . $z
    . '</a>'
    ;
    return $teaser;
}



// USE CASES
echo "<pre>";
echo PHP_EOL;
echo "1...5...10...15...20...25...30...35...40...45..." . PHP_EOL;
echo teaser_fragment('Now is the time for all good men to come to the aid of their party');

echo PHP_EOL;
echo teaser_fragment('Now is the time for all good men to come to the aid of their party', 300);

echo PHP_EOL;
echo teaser_fragment('Now is the time for all good men to come to the aid of their party', 15, 'http://en.wikipedia.org/wiki/Filler_text');

Open in new window

0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
PHP

From novice to tech pro — start learning today.