TYPO3 Core

if ($conf['cropHTML']){$content=$this->cropHTML($content, $conf['cropHTML']);}

* Implements the stdWrap property "crop" which is a modified "substr" function allowing to limit a string lenght to a certain number of chars (from either start or end of string) and having a pre/postfix applied if the string really was cropped.

*

* @param string The string to perform the operation on

* @param string The parameters splitted by "|": First parameter is the max number of chars of the string. Negative value means cropping from end of string. Second parameter is the pre/postfix string to apply if cropping occurs. Third parameter is a boolean value. If set then crop will be applied at nearest space.

* @return string The processed input value.

* @access private

* @see stdWrap()

*/

function cropHTML($content,$options) {

$options = explode('|',$options);

$chars = intval($options[0]);

$replacementForEllipsis = trim($options[1]);

$crop2space = isset($options[2]) ? trim($options[2]) : 0;

// split $content into an array (even items in the array are outside the tags, odd numbers are tag-blocks)

$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|link';

$tagsRegEx = "

(

(?:

<!--.*?-->

)

|

</?(?:". $tags . ")+

(?:

(?:

\s+\w+

(?:

\s*=?\s*

(?>

\".*?\"

|

'.*?'

|

[^'\">\s]+

)

)?

)+

\s*|\s*

)

/?>

)";

$splittedContent = preg_split('#' . $tagsRegEx . '#ux', $content, -1, PREG_SPLIT_DELIM_CAPTURE);

// reverse array if we are cropping from right

if ($chars < 0) {

$splittedContent = array_reverse($splittedContent);

}

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

$strLen = 0;

$croppedOffset = NULL; // offset of the content item which was cropped

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

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))) {

$croppedOffset = $offset;

$cropPosition = abs($chars) - $strLen;

if ($crop2space) {

$cropRegEx = $chars < 0 ? '#(?<=\s).{0,' . $cropPosition . '}$#ui' : '#^.{0,' . $cropPosition . '}(?=\s)#ui';

} else {

$cropRegEx = $chars < 0 ? '#(.(?![^&\s]{2,7};)|(&[^&\s;]{2,7};)){0,' . $cropPosition . '}$#ui' : '#^(.(?![^&\s]{2,7};)|(&[^&\s;]{2,7};)){0,' . $cropPosition . '}#ui';

}

if (preg_match($cropRegEx, $splittedContent[$offset], $croppedMatch)) {

$splittedContent[$offset] = $croppedMatch[0];

}

break;

} else {

$strLen += $thisStrLen;

}

}

}

// close cropped tags

$closingTags = array();

if($croppedOffset !== NULL) {

$tagName = '';

$openingTagRegEx = '#^<(\w+)(?:\s|>)#u';

$closingTagRegEx = '#^</(\w+)(?:\s|>)#u';

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

if (preg_match('&/>$&', $splittedContent[$offset])) {

// ignore empty element tags (e.g. <br />)

continue;

}

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

$tagName = isset($matches[1]) ? $matches[1] : NULL;

if ($tagName !== NULL) {

// seek for the closing (or opening) tag

$seekingTagName = '';

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

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

$seekingTagName = isset($matches[1]) ? $matches[1] : NULL;

if ($tagName === $seekingTagName) { // we found a matching tag

// add closing tag only if it occurs after the cropped content item

if ($seekingOffset > $croppedOffset) {

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

}

break;

}

}

}

}

array_splice($splittedContent, $croppedOffset + 1); // drop the cropped items of the content array

}

$splittedContent = array_merge($splittedContent, array($croppedOffset !== NULL ? $replacementForEllipsis : ''), $closingTags);

// reverse array once again if we are cropping from the end

if ($chars < 0) {

$splittedContent = array_reverse($splittedContent);

}

return implode('', $splittedContent);

}

/**