只显示具有给定长度的单词 - 字符串php

Question

Example:

a
aaa
aaaaa
aaa
aa

If given length is 3 then it should show:

aaa
aaa

I have:

$words = explode(" ", $_POST['txt']);
for ($i=0; $i<count($words); $i++){ 
echo $words[$i] . " ";

Can this be done with foreach?

Answer 1

$words = explode(" ", $_POST['txt']);
$length = 3;

foreach($words as $word) {
    // mb_strlen to take multibyte characters into account
    if(mb_strlen($word) == $length) {
        echo $word . "
";
    }
}

Maybe?