PHP组合二乘二

Question

I searched the site but I could not find what I need and I do not know how to do this code. I need a script to make all the combinations in an array

For example i have this array:

$players = ('1', '2', '3', '4', '5');

And i need this output

1 - 2
1 - 3
1 - 4
1 - 5
2 - 3
2 - 4
2 - 5
3 - 4
3 - 5
4 - 5

Thanks in advance

Answer 1

$players = array('1','2','3','4','5');

while(count($players) != 0){
    $currentPlayer = array_shift($players);
    foreach($players as $player){
        echo $currentPlayer.' - '.$player.'<br/>';
    }
}

Edit: My code works, even if the playernumbers are nonconsecutive. The $players array can look like this $players = ('1','5','209','42'); and still print out the desired output.