<?php

set_time_limit(0);

$texte = " vi eur ger araog nek ar c'hatekis nag hini ar [...] finvez ";

$l = mb_strlen($texte)-3;

for ($i = 0; $i < $l; $i++) {
    $tri = mb_substr($texte, $i, 3);

    $trigrammes["$tri"] ++;
}


arsort($trigrammes);

$t = 0;
foreach ($trigrammes as $key => $value) {
        if ($t < 300) echo "\"$key\", ";
        $t++;
}


echo "<br /><br />FIN";

?>