TYPO3 Core

if (strlen($content) > abs($chars)) {

$tags = 'a|b|blockquote|body|div|em|font|form|h1|h2|h3|h4|h5|h6|i|li|map|ol|option|p|pre|sub|sup|select|span|strong|table|td|textarea|tr|u|ul|br|hr|img|input|area';

$regEx = '/(\<\/?(?:' . $tags . ')(?:\s*\>|\s[^\>]*\>))/si';

$splittedContent = preg_split($regEx, $content, -1, PREG_SPLIT_DELIM_CAPTURE);

$strlen = 0;

// reverse array for 'back cropping'

$splittedContent = $chars < 0 ? array_reverse($splittedContent) : $splittedContent;

// crop the text (chars of a tag are not counted)

for ($offset=0; $offset < count($splittedContent); $offset++) {

// debug($splittedContent[$offset],1);

if ($offset%2 === 0) {

$thisStrLen = $GLOBALS['TSFE']->csConvObj->strlen($GLOBALS['TSFE']->renderCharset, html_entity_decode($splittedContent[$offset],ENT_COMPAT,$GLOBALS['TSFE']->renderCharset));

if (($strlen + $thisStrLen > abs($chars))) {

$cropPosition = $chars - $strlen;

if ($chars < 0) {

$splittedContent[$offset] = $GLOBALS['TSFE']->csConvObj->substr($GLOBALS['TSFE']->renderCharset, $splittedContent[$offset], $cropPosition);

$truncatePosition = strpos($splittedContent[$offset], ' ');

$splittedContent[$offset] = ($truncatePosition && $crop2space) ? $afterstring . $GLOBALS['TSFE']->csConvObj->substr($GLOBALS['TSFE']->renderCharset, $splittedContent[$offset], $truncatePosition) : $afterstring . $splittedContent[$offset];

} else {

$splittedContent[$offset] = $GLOBALS['TSFE']->csConvObj->substr($GLOBALS['TSFE']->renderCharset, $splittedContent[$offset], 0, $cropPosition);

$truncatePosition = strrpos($splittedContent[$offset], ' ');

$splittedContent[$offset] = ($truncatePosition && $crop2space) ? $GLOBALS['TSFE']->csConvObj->substr($GLOBALS['TSFE']->renderCharset, $splittedContent[$offset], 0, $truncatePosition) . $afterstring : $splittedContent[$offset] . $afterstring;

}

// remember the $offset where we cropped the content

$croppedOffset = $offset;

break;

} else {

$strlen += $thisStrLen;

}

}

}

// close cropped tags

$closingTags = array();

$tagName = '';

$openingTagRegEx = '/^<([a-zA-Z0-6]+)(?:\s|>)/';

$closingTagRegEx = '/^<\/([a-zA-Z0-6]+)(?:\s|>)/';

for ($offset=$croppedOffset-1; $offset >= 0; $offset = $offset-2) {

if (preg_match('/\/\>$/',$splittedContent[$offset])) continue; // ignore empty element tags (e.g. <br />)

preg_match($chars<0?$closingTagRegEx:$openingTagRegEx, $splittedContent[$offset], $matches);

$tagName = $matches[1];

// seek for the closing (or opening) tag

if (trim($tagName)!=='') {

$seekingTagName = '';

for ($seekingOffset=$offset+2; $seekingOffset < count($splittedContent); $seekingOffset = $seekingOffset+2) {

preg_match($chars<0?$openingTagRegEx:$closingTagRegEx, $splittedContent[$seekingOffset], $matches);

$seekingTagName = $matches[1];

if (($tagName === $seekingTagName) && ($seekingOffset > $croppedOffset)) {

$closingTags[] = $splittedContent[$seekingOffset];

break;

}

}

}

}

// drop the unnecessary items of the content array

array_splice($splittedContent,$croppedOffset+1);

// reverse array for 'back cropping'

if ($chars < 0) {

$splittedContent = array_merge($splittedContent,$closingTags);

$splittedContent = array_reverse($splittedContent);

$splittedContent = array_merge($splittedContent,$closingTags);

$content = implode('',$splittedContent);