<?php
function punyaHuruf(string $kataPertama, string $kataKedua): bool {
    $kataPertama = strtolower($kataPertama);
    $kataKedua = strtolower($kataKedua);
 
    for ($i = 0; $i < strlen($kataPertama); $i++) {
        if (strpos($kataKedua, $kataPertama[$i]) === false) {
            return false;
        }
    }
    return true;
}
 
// Contoh penggunaan
var_dump(punyaHuruf('cat', 'antarctica'));  // TRUE
var_dump(punyaHuruf('cat', 'australia'));   // FALSE
var_dump(punyaHuruf('cat', 'ANTARCTICA'));  // TRUE
?>
 

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