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run code in 150+ php & hhvm versions
Bugs & Features
<?php function truncate($text, $length = 100, $options = array()) { $default = array( 'ending' => '...', 'exact' => true, 'html' => false ); $options = array_merge($default, $options); extract($options); if ($html) { if (mb_strlen(preg_replace('/<.*?>/', '', $text)) <= $length) { return $text; } $totalLength = mb_strlen(strip_tags($ending)); $openTags = array(); $truncate = ''; preg_match_all('/(<\/?([\w+]+)[^>]*>)?([^<>]*)/', $text, $tags, PREG_SET_ORDER); foreach ($tags as $tag) { if (!preg_match('/img|br|input|hr|area|base|basefont|col|frame|isindex|link|meta|param/s', $tag[2])) { if (preg_match('/<[\w]+[^>]*>/s', $tag[0])) { array_unshift($openTags, $tag[2]); } else if (preg_match('/<\/([\w]+)[^>]*>/s', $tag[0], $closeTag)) { $pos = array_search($closeTag[1], $openTags); if ($pos !== false) { array_splice($openTags, $pos, 1); } } } $truncate .= $tag[1]; $contentLength = mb_strlen(preg_replace('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', ' ', $tag[3])); if ($contentLength + $totalLength > $length) { $left = $length - $totalLength; $entitiesLength = 0; if (preg_match_all('/&[0-9a-z]{2,8};|&#[0-9]{1,7};|&#x[0-9a-f]{1,6};/i', $tag[3], $entities, PREG_OFFSET_CAPTURE)) { foreach ($entities[0] as $entity) { if ($entity[1] + 1 - $entitiesLength <= $left) { $left--; $entitiesLength += mb_strlen($entity[0]); } else { break; } } } $truncate .= mb_substr($tag[3], 0 , $left + $entitiesLength); break; } else { $truncate .= $tag[3]; $totalLength += $contentLength; } if ($totalLength >= $length) { break; } } } else { if (mb_strlen($text) <= $length) { return $text; } else { $truncate = mb_substr($text, 0, $length - mb_strlen($ending)); } } if (!$exact) { $spacepos = mb_strrpos($truncate, ' '); if (isset($spacepos)) { if ($html) { $bits = mb_substr($truncate, $spacepos); preg_match_all('/<\/([a-z]+)>/', $bits, $droppedTags, PREG_SET_ORDER); if (!empty($droppedTags)) { foreach ($droppedTags as $closingTag) { if (!in_array($closingTag[1], $openTags)) { array_unshift($openTags, $closingTag[1]); } } } } $truncate = mb_substr($truncate, 0, $spacepos); } } $truncate .= $ending; if ($html) { foreach ($openTags as $tag) { $truncate .= '</'.$tag.'>'; } } return $truncate; } print truncate( 'Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. <strong>Stet clita kasd gubergren</strong>', 236, array('html' => true, 'ending' => ''));
Output for 4.3.3 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. <strong>Stet clita kasd gubergr</strong>
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.3.2
Warning: Wrong value for parameter 4 in call to preg_match_all() in /in/D8nni on line 36 Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. <strong>Stet clita kasd gubergr</strong>