一个关于算法的，请大家帮帮忙
$arr = array(
array( "A", "B", "C"),
array("1", "2", "3", "4"),
array("X", "Y", "Z"),
....................................
);
这样的一个数字，如何打印成下面的样子 （数组的大小不定）
A 1 X
A 1 Y
A 1 Z
A 2 X
A 2 Y
A 2 Z
A 3 X
A 3 Y
A 3 Z
A 4 X
A 4 Y
A 4 Z
B 1 X
B 1 Y
B 1 Z
B 2 X
B 2 Y
B 2 Z
B 3 X
B 3 Y
B 3 Z
B 4 X
B 4 Y
B 4 Z
C 1 X
C 1 Y
C 1 Z
C 2 X
C 2 Y
C 2 Z
C 3 X
C 3 Y
C 3 Z
C 4 X
C 4 Y
C 4 Z
------解决方案--------------------
这个符合你的输出要求
$arr = array(<br /> array( "A", "B", "C"),<br /> array("1", "2", "3", "4"),<br /> array("X", "Y", "Z"),<br />);<br /> <br />function foo($d) {<br /> $r = array_pop($d);<br /> while($d) {<br /> $t = array();<br /> foreach(array_pop($d) as $k1=>$x) {<br /> foreach($r as $k2=>$y) $t[] = "$x $y";<br /> }<br /> $r = $t;<br /> }<br /> return $r;<br />}<br />print_r(foo($arr));<br />Array<br>(<br> [0] => A 1 X<br> [1] => A 1 Y<br> [2] => A 1 Z<br> [3] => A 2 X<br> [4] => A 2 Y<br> [5] => A 2 Z<br> [6] => A 3 X<br> [7] => A 3 Y<br> [8] => A 3 Z<br> [9] => A 4 X<br> [10] => A 4 Y<br> [11] => A 4 Z<br> [12] => B 1 X<br> [13] => B 1 Y<br> [14] => B 1 Z<br> [15] => B 2 X<br> [16] => B 2 Y<br> [17] => B 2 Z<br> [18] => B 3 X<br> [19] => B 3 Y<br> [20] => B 3 Z<br> [21] => B 4 X<br> [22] => B 4 Y<br> [23] => B 4 Z<br> [24] => C 1 X<br> [25] => C 1 Y<br> [26] => C 1 Z<br> [27] => C 2 X<br> [28] => C 2 Y<br> [29] => C 2 Z<br> [30] => C 3 X<br> [31] => C 3 Y<br> [32] => C 3 Z<br> [33] => C 4 X<div class="clear">
</div>
