$text */ function makeFirstCharUpperCase(array $text): string { $result = ''; foreach ($text as $string) { $string = trim($string); $upperChar = mb_strtoupper(mb_substr($string, 0, 1)); $result .= $upperChar . mb_substr($string, 1); } return $result; } function fixText(string $text): ?string { $text = preg_split('/(?<=[.!?])(?=[\w\s])/u', $text, -1, PREG_SPLIT_NO_EMPTY); $sentences = makeFirstCharUpperCase($text); /** @phpstan-ignore-line */ return preg_replace( ['/\s\s+/', '/\s([.,:;!?])/', '/([.,:;!?])(\w)/u'], [' ', '$1', '$1 $2'], $sentences ); } echo fixText($text1) . "
"; echo fixText($text2) . "
"; echo fixText($text3) . "
"; echo fixText($text4) . "
";