nhl vtt concat

vtt-concat.php

<?php

function vtt_concat($t1, $t2) {
        for ($i = 1; $i < strlen($t1); $i++) {
                $t1_part = substr($t1, -$i);
                $t2_has_t1_part = (strstr($t2, $t1_part) !== false);
                if ($t2_has_t1_part) {
                        continue;
                } elseif ($i == 1) {
                        break;
                }
                $i--;
                $t1 = substr($t1, 0, -$i);
        }

        return $t1 . $t2 . "\n";
}

echo vtt_concat('What is you', 'is your name?');
echo vtt_concat('What is your', ' name?');