szukanie wyrazu posiadajacego dane litery, slownik scrabble Opcje

[bercow]

Mamy tablice $slowo (na koncu bedzie pewnie duuuuzo wieksza, i jakies wprowadzone litery $litery, jak znalesc wszystkie slowa ktore mozna ulozyc z podanych liter, w tej chwili dostaje 'jak nizej', nie wiem czemu czesc pomija

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katarek - a
katarek - a
katarek - r
zak - z
zak - a
rak - r
rak - a
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<?php
 
$slowo = array ("katarek", "zak", "rak");
$litery = array ("k", "a", "z", "m", "r");
 
for ($j=0;$j<count($slowo);$j++) {
	$litera = $slowo[$j];
 
	for ($i=0;$i <= strlen($litera);$i++) {
		$key = array_search($litera[$i], $litery);
		if ($key == TRUE) {
			echo $slowo[$j]." - ".$litera[$i]."<br />";
		}
	}
}
?>
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[bercow]

Probowalem juz z posortowaniem, ale mimo iz slowo ulozyc mozna, wyniki nie sa identyczne.

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[0] = a [1] = a [2] = e [3] = k [4] = k [5] = r [6] = t 
[0] = a [1] = k [2] = m [3] = r [4] = z [0] = a [1] = a [2] = e [3] = k [4] = k [5] = r [6] = t [7] = a [8] = a [9] = a 
[0] = a [1] = k [2] = m [3] = r [4] = z [0] = a [1] = a [2] = e [3] = k [4] = k [5] = r [6] = t [7] = a [8] = a [9] = a [10] = e [11] = k [12] = k 
[0] = a [1] = k [2] = m [3] = r [4] = z
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<?php
 
$slowo = array ("katarek", "zak", "rak");
$litery = array ("k", "a", "z", "m", "r");
 
for ($j=0;$j<count($slowo);$j++) {
	$litera = $slowo[$j];
 
	for ($i=0;$i <= strlen($litera)-1;$i++) {
		$slowo_sort[] = $litera[$i];
	//	echo $litera[$i]." ";
		$key = array_search($litera[$i], $litery);
		if ($key == TRUE) {
		//	echo $slowo[$j]." - ".$litera[$i]."<br />";
		}
	}
 
	sort($slowo_sort);
	foreach ($slowo_sort as $key => $val[]) {
	    echo "[" . $key . "] = " . $val[$key]." ";
	}
	echo "<br />";
	sort($litery);
	foreach ($litery as $key_l => $val_l[]) {
	    echo "[" . $key_l . "] = " . $val_l[$key_l]." ";
	}
 
}
 
 
?>
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