生成元素的所有組合

Question

我必須通過唯一值和有序方式生成元素的所有組合。 我用一個例子解釋，這些都是參數和值：使用數組

Dog : mal | female 
Color : red | blue | yellow 

the all combinations (ordered) to get are : 
male - red 
male - blue 
male - yellow 
female - red 
female - blue 
female - yellow 

我如何能做到這一點在PHP？

在此先感謝

Answer 1

$dogs = array('male', 'female'); 
$colors = array('red', 'blue', 'yellow'); 

foreach($dogs as $dog) 
    foreach($colors as $color) 
     echo $dog . ' - ' . $color . "\n"; 

輸出：

male - red 
male - blue 
male - yellow 
female - red 
female - blue 
female - yellow 

Demo