String Manipulation

[Anon]

Im experiencing problems with manipulating strings. Im trying to format the input from a textarea into two strings, but don't want to just cut them in half incase it's in the middle of a word....

So im using substr() to do this with a loop....Here is my code,

<?
if (strlen($details) > 40)
{
for ($i=-1; $i >= -20; $i--)
{

if ($i == -1)
{
$temp = substr($details, 0, 40);
$temp2 = substr($temp, 40+$i);

    if ($temp2 == "")
    {
      $end = 1;
    }
  }

  if ($i != -1)
  {
    $temp = substr($details, 0, 40);
    $temp2 = "substr($temp, 40+$i, $i+1)";

    if ($temp2 == "")
    {
      $end = 1;
    }
  }

 if (isset($end))
   break;

}

}

$first = substr($details, 0, (40 + $i));

$second = substr($details, (40 + $i));

echo "$first<br>
$second";
?>

But this script cuts the strings in the wrong place, I know it's to do with the IF loops comparing each charecter in turn to " ".....But it doesn't do the compare correctly.....This should be a simple problem, but im not seeing it...!!!

Thanks,
Ian

[Anon]

I've found 2 problems right away:

$temp2 = "substr($temp, 40+$i, $i+1)";

should be:

$temp2 = substr($temp, 40+$i, $i+1);

And
if ($temp2 == "")

should be:
if ($temp2 == " ")

But there's an easier way to do this:

$max = 40;
if (strlen($details) > $max) {
$spaceIndex = strrpos(substr($details, 0, $max), ' ');
$first = substr($details, 0, $spaceIndex);
$second = substr($details, $spaceIndex);
}
print $first . "\n";
print $second . "\n";

Diego