parsedown-extra

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Moving this issue from: https://github.com/erusev/parsedown/issues/616

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Quoting @oufloued:

had this problem with abbreviation definition ending with czech characters. ( which are quite common in czech republic ;) anyway same problem with deutschem Ää et al ) the u modifier solved it.

found on: https://stackoverflow.com/questions/1766485/are-the-php-preg-functions-multibyte-safe#answer-1766767

not sure though about that. what do you think?

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PHP 7.0.27-0+deb9u1 (cli) (built: Jan 5 2018 13:51:52) ( NTS )

//contains original code from ParsedownExtra.php, modified to demonstrate …

$text = 'Františkovy Lázně foreva'; //works only with the u modifier
//$text = 'Františkovy Lázněforeva'; //works without the u modifier

$abbreviation = 'Františkovy Lázně';
$meaning = 'Franzensbad';

//original: $pattern = '/\b'.preg_quote($abbreviation, '/').'\b/';
$pattern = '/\b'.preg_quote($abbreviation, '/').'\b/u';

$text = preg_replace($pattern, '<abbr title="'.$meaning.'">'.$abbreviation.'</abbr>', $text);

print_r($text);