/**
* "strtoupper" function with HTML tags and entities handling.
*
* @param string $str Text to convert
*
* @return string Converted text
*/
private function toupper($str)
{
if ($this->options['do_upper'] !== true) {
return $str;
}
// string can contain HTML tags
$chunks = preg_split('/(<[^>]*>)/', $str, null, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE);
// convert toupper only the text between HTML tags
foreach ($chunks as $i => &$chunk) {
if ($chunk[0] != '<') {
$chunk = UTF8::strtoupper($chunk);
}
}
return implode($chunks);
}
/**
* @param string $word
*
* @return string
*/
private function capitalizeWord($word)
{
$encoding = $this->encoding;
$firstCharacter = UTF8::substr($word, 0, 1, $encoding);
$restOfWord = UTF8::substr($word, 1, null, $encoding);
$firstCharacterUppercased = UTF8::strtoupper($firstCharacter, $encoding);
return new static($firstCharacterUppercased . $restOfWord, $encoding);
}