<?php
error_reporting(-1);
mb_internal_encoding('utf-8');
 
$text = "ну что.      не смотрел еще black mesa.я собирался скачать  ,но все как-то некогда было.";
function makeFirstLetterUppercase($text) {
	$regexp = '/[.!?]/u';
	$parts = preg_split($regexp, $text, 0, PREG_SPLIT_NO_EMPTY);
 
	foreach($parts as $textFor){
		$trim = ltrim($textFor);
		$first = mb_substr($trim, 0, 1);
		$second = mb_substr($trim, 1);
		$first = mb_strtoupper($first);
		$text = $first . $second . ".";
		echo "{$text}\n";
	}
	return implode(" ", $text);
	echo "$text\n";
}
function fixText($text){
	$regexp2="/[\s]+,|,[\s]+/u";
	$text=preg_replace($regexp2, ", ",$text);
	return makeFirstLetterUppercase($text);
}
$result = fixText($text);
echo "$result\n";
 

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