<?php
 
function punyaHuruf(string $kataPertama, string $kataKedua): bool {
	$kataPertama = strtolower($kataPertama);
	$kataKedua = strtolower($kataKedua);
 
	foreach(str_split($kataPertama) as $huruf) {
		// print_r($huruf);
		// print_r(strpos($kataKedua, $huruf));
		if (strpos($kataKedua, $huruf) === false) {
			// print_r(strpos($huruf, $kataKedua));
			return false;
		}
	}
 
	return true;
}
 
echo punyaHuruf('cat', 'antarctica') ? "true" : "false";	// TRUE
echo punyaHuruf('cat', 'australia') ? "true" : "false";	// FALSE
echo punyaHuruf('cat', 'ANTARCTICA') ? "true" : "false";	// TRUE
?>

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