<?php
 
error_reporting(-1);
mb_internal_encoding('utf-8');
 
$text = "ну что.      не смотрел еще black mesa.я собирался скачать  ,но все как-то некогда было.";
// Для тестов
// $text = 'roses are red,and violets are blue.whatever you do i'll keep it for you.';
// $text = 'привет.есть 2 функции,preg_split и explode ,не понимаю,в чем между ними разница.';
 
/* Делает первую букву в строке заглавной */
function makeFirstLetterUppercase($text) {
    $text = preg_split('#[?!.]#u', $text, -1, PREG_SPLIT_NO_EMPTY);
    for ($i = 0; i < sizeof($text),$i++{
    	$text[$i] = trim($text[$i]);
    	$text[$i] = preg_split('//u', $text[$i], -1, PREG_SPLIT_NO_EMPTY);
    	$text[$i][0] = mb_strtoupper($text[$i][0]);
    	$text[$i] = implode("", $text[$i]);echo "$input\n";
    }
    $text = implode(".",$text);
    return $text;
}
 
/* исправляет текст */
function fixText($text){
	$text = makeFirstLetterUppercase($text);
	$reg = '#([А-Я]\\.)#u';
	$text = preg_replace($reg, "$1 ", $text);
	return $text;
}
 
$result = fixText($text);
echo "{$result}\n";
 

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