$1',
'/\*\*([^*]+)\*\*/' => '$1',
'/(? '$1',
'/\[([^\]]+)\]\((https?:\/\/[^\s)]+)\)/' => '$1',
];
$text = preg_replace(array_keys($patterns), array_values($patterns), $text);
// Bare URLs, but not ones already inside an anchor from the step above.
return preg_replace(
'/(?)(https?:\/\/[^\s<]+)/',
'$1',
$text,
);
}
/**
* Blocks: bulleted lists, numbered lists, and everything else as paragraphs.
*
* Models mix "-", "*", "1." and "1)" freely, so all four are treated as list
* markers rather than left as literal characters.
*/
private static function paragraphs(string $text): string
{
$html = '';
$list = null;
foreach (preg_split('/\R/', $text) as $line) {
$line = rtrim($line);
if (trim($line) === '') {
$html .= self::closeList($list);
continue;
}
if (preg_match('/^\s*[-*]\s+(.*)$/u', $line, $matches)) {
$html .= self::openList($list, 'ul');
$html .= ''.$line.'
'; } return $html.self::closeList($list); } private static function openList(?string &$list, string $tag): string { if ($list === $tag) { return ''; } $html = self::closeList($list); $list = $tag; return $html."<{$tag}>"; } private static function closeList(?string &$list): string { if ($list === null) { return ''; } $html = ""; $list = null; return $html; } /** A short single line, for places that cannot take block markup. */ public static function toLine(?string $text): string { return Str::of((string) $text)->replaceMatches('/\s+/', ' ')->trim()->toString(); } }