Dictionary

<?php

$wordPairs = explode(" | ", readline());
$wordsToSearchFor = explode(" | ", readline());
$command = readline();

$words = [];
for ($i = 0; $i < count($wordPairs);$i++){
    list($word, $desc) = explode(": ", $wordPairs[$i]);
    $words[$word][] = $desc;
}

ksort($words);
foreach ($words as $word => $desc) {
    if ($command === "List") {
        echo $word . " ";
    } else if ($command === "End") {
        if (in_array($word, $wordsToSearchFor)) {
            echo $word . PHP_EOL;
            usort($desc, function ($val1, $val2) use ($desc) {
               return strlen($val2) <=> strlen($val1);
            });
            foreach ($desc as $item) {
                echo " -$item" . PHP_EOL;
            }
        }
    }
}