Kanji to romaji PHP + Kakasi

Kanji to romaji

#!/usr/bin/php
<?php

$descriptorspec = [
   0 => ['pipe', 'r'], // stdin
   1 => ['file', 'php://stdout', 'w'], // stdout
   2 => ['file', 'php://stderr', 'a'], // stderr
];
$kakasi = 'kakasi -i euc -w | kakasi -i euc -Ha -Ka -Ja -Ea -ka';

$kanjiToRomaji = function($kanji) use ($descriptorspec, $kakasi){
    $process = proc_open($kakasi, $descriptorspec, $pipes);
    if (is_resource($process)) {
        fwrite($pipes[0], iconv('utf-8', 'eucjp', $kanji));
        fclose($pipes[0]);
        proc_close($process);
    }
};

if ($args = array_slice($argv, 1)){
    foreach($args as $line)     $kanjiToRomaji($line . "\n");
} else {
    while($line = fgets(STDIN)) $kanjiToRomaji($line);
}