Getting time to read the article with the images in it

reading_time.php

<?php

function getReadingTime($content)
{
    $wordsPerMinuten = 200; // ru: слов в минуту
    $secondsPerImage = 5;   // ru: секунд на изображение
    
    preg_match_all("~<img~i", $content, $resImgs);
    $imgsTime = count($resImgs[0]) * $secondsPerImage;
    $words = count(explode(' ', strip_tags(str_replace(["\n", '><'], ' ', $content))));
    $allSeconds = ($words / $wordsPerMinuten) * 60 + $imgsTime;
    $minutes = floor($allSeconds / 60);
    $seconds = round(($allSeconds % 60) / 10) * 10;
    return trim(($minutes ? $minutes . ' min. ' : '') . ($seconds ? $seconds . ' sec.' : ''));
}