找到字符串中第一个重复的单词[关闭]

Question

I need to get the output of the first repeated word from the following

$input ="we are the people who are selected by the people of country who gave vote."

Desired output "are"

Answer 1

You can try with explode() and array_count_values(). explode() break down the string to array by a delimiter (here space) and array_count_values() count the occurrence of the array elements.

$input ="we are the people who are selected by the people of country who gave vote.";
$words = array_count_values(explode(' ', strtolower($input)));

$first_occ = '';
foreach ($words as $word => $count) {
    if ($count > 1) {
        $first_occ = $word;
        break;
    }
}
echo $first_occ;

Working demo.

Also can see str_word_count.