我有一个如下的数组...
array(2) {
["gender"]=>
array(2) {
[1]=>
string(4) "Male"
[2]=>
string(6) "Female"
}
["agegroup"]=>
array(3) {
[3]=>
string(7) "18 - 24"
[4]=>
string(7) "25 - 40"
[5]=>
string(7) "40 - 65"
}
}
这个数组是动态的。与“性别”和“年龄组”一样,可以有任意数量的项目。所有这些项都是子数组(关联)。我想在php中编写一个循环,它从第一个数组元素循环到其他数组元素中。
In the above example... the following output should come...
Male- 18-24
Male- 25-40
Male- 40-65
FeMale- 18-24
FeMale- 25-40
FeMale- 40-65
如果数组如下......
array(2) {
["location"]=>
array(2) {
[A]=>
string(4) "New York"
[B]=>
string(6) "London"
}
["gender"]=>
array(2) {
[1]=>
string(4) "Male"
[2]=>
string(6) "Female"
}
["agegroup"]=>
array(3) {
[3]=>
string(7) "18 - 24"
[4]=>
string(7) "25 - 40"
[5]=>
string(7) "40 - 65"
}
}
然后......输出应该是......
New York- Male- 18-24
New York- Male- 25-40
New York- Male- 40-65
New York- FeMale- 18-24
New York- FeMale- 25-40
New York- FeMale- 40-65
London- Male- 18-24
London- Male- 25-40
London- Male- 40-65
London- FeMale- 18-24
London- FeMale- 25-40
London- FeMale- 40-65
如果定义了数组长度,我将能够使用foreach()
来编写代码段。但是父数组和子数组的数组长度都是动态的...有人能给我一些如何循环它以获得所需输出的提示吗?
答案 0 :(得分:3)
function make ($arr, $pref = '') { // pref - saving path to this point
foreach (array_shift($arr) as $item) // take the 1st item of array and remove it
if($arr) make($arr,$pref . $item ." - "); // Call with sub-tree, add item to path
else echo $pref . $item ."\n"; // Empty array - we are at leaf
}
make($arr);
第二案例结果:
New York - Male - 18 - 24
New York - Male - 25 - 40
New York - Male - 40 - 65
New York - Female - 18 - 24
New York - Female - 25 - 40
New York - Female - 40 - 65
London - Male - 18 - 24
London - Male - 25 - 40
London - Male - 40 - 65
London - Female - 18 - 24
London - Female - 25 - 40
London - Female - 40 - 65