/**
* UTF-8 aware alternative to stristr
*
* Returns all of haystack from the first occurrence of needle to the end.
* needle and haystack are examined in a case-insensitive manner
* Find first occurrence of a string using case insensitive comparison
*
* @param string the haystack
* @param string the needle
* @return string the sub string
* @see http://www.php.net/stristr
*/
public static function stristr($str, $search)
{
if (strlen($search) == 0) {
return $str;
}
$lstr = KHelperString::strtolower($str);
$lsearch = KHelperString::strtolower($search);
preg_match('|^(.*)' . preg_quote($lsearch) . '|Us', $lstr, $matches);
if (count($matches) == 2) {
return substr($str, strlen($matches[1]));
}
return FALSE;
}
/**
* returns substring of characters around a searchword.
*
* @param string The source string
* @param int Number of chars to return
* @param string The searchword to select around
*
* @return string
*/
public function substring($text, $searchword, $length = 200)
{
$textlen = KHelperString::strlen($text);
$lsearchword = KHelperString::strtolower($searchword);
$wordfound = false;
$pos = 0;
while ($wordfound === false && $pos < $textlen) {
if (($wordpos = @KHelperString::strpos($text, ' ', $pos + $length)) !== false) {
$chunk_size = $wordpos - $pos;
} else {
$chunk_size = $length;
}
$chunk = KHelperString::substr($text, $pos, $chunk_size);
$wordfound = KHelperString::strpos(KHelperString::strtolower($chunk), $lsearchword);
if ($wordfound === false) {
$pos += $chunk_size + 1;
}
}
//while
if ($wordfound !== false) {
return ($pos > 0 ? '... ' : '') . $chunk . ' ...';
} else {
if (($wordpos = @KHelperString::strpos($text, ' ', $length)) !== false) {
return KHelperString::substr($text, 0, $wordpos) . ' ...';
} else {
return KHelperString::substr($text, 0, $length);
}
}
}
