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PHP Truncate File Name

/ Published in: Pascal
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  1. <?php
  2.  
  3. function truncateFilename($filename, $max = 30) {
  4. 	if (strlen($filename) <= $max) {
  5. 		return $filename;
  6. 	}
  7. 	if ($max <= 3) {
  8. 		return '...';
  9. 	}
  10. 	if (!preg_match('/^(.+?)(\.[^\.]+)?$/', $filename, $match)) {
  11. 		// has newlines or is an empty string
  12. 		return $filename;
  13. 	}
  14. 	list (, $name, $ext) = $match;
  15. 	$extLen = strlen($ext);
  16. 	$nameMax = $max - ($extLen == 0 ? 3 : $extLen + 2); // 2 for two dots of the elipses
  17. 	if ($nameMax <= 1) {
  18. 		$truncated = substr($filename, 0, $max - 3) . '...';
  19. 	}
  20. 	else {
  21. 		$truncated = substr($name, 0, $nameMax) . '...' . substr($ext, 1);
  22. 	}
  23. 	return $truncated;
  24. }

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