truncatetext.php

<?php

function safe_truncate_text($text, $lenght)
{
  $trailingDots  = '';
  $truncatedText = substr($text . ' ', 0, $lenght);

  if (strlen($text) > $lenght)
  {
    $truncatedText = preg_replace('/ [^ ]+$/', '', ' ' . $truncatedText);
    $truncatedText = trim($truncatedText);
    $trailingDots  = !empty($truncatedText) ? '...' : '';
  }

  return $truncatedText . $trailingDots;
}


/// TEST

$text = "Text Text Text Text Text ";

$t->is(safe_truncate_text($text, 10), 'Text Text...');
$t->is(safe_truncate_text($text, 1), '');
$t->is(safe_truncate_text($text, 12), 'Text Text...');
$t->is(safe_truncate_text($text, 15), 'Text Text Text...');
$t->is(safe_truncate_text('The quick', 2), '');
$t->is(safe_truncate_text('The quick', 4), 'The...');
$t->is(safe_truncate_text('The quick', 6), 'The...');
$t->is(safe_truncate_text('The quick', 9), 'The quick...'); // Fail: I don't think that an undersized string when truncated has the trailing dots