Sharing of algorithm for selecting three from three groups in sports lottery_PHP tutorial

Copy code The code is as follows:

function arrange($arr){
$new_arr = array();
$c = count($arr);
foreach($arr as $key=>$vo){
$lin = $arr;
array_splice($lin,$key,1) ;
for($l=0;$l<$c-1;$l++){
$larr = array();
$larr[] = $lin[$l];
$larr[] = $vo;
$larr[] = $vo;
$new_arr[] = $larr;
}
}
return $new_arr;
}
$arr = array(1,2,3,4);
$r = arrange($arr);
print_r($r);

The result obtained is:

Copy the code The code is as follows:

Array
(
[0 ] => Array
(
[0] => 2
[1] => 1
[2] => 1
)

[1] => Array
(
[0] => 3
[1] => 1
[2] => 1
)

[2] => Array
(
[0] => 4
[1] => 1
[2] => 1
)

[3] => Array
(
[0] => 1
[1] => 2
[2] => 2
)

http://www.bkjia.com/PHPjc/736789.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/736789.htmlTechArticleCopy the code The code is as follows: function arrange($arr){ $new_arr = array(); $c = count( $arr); foreach($arr as $key=$vo){ $lin = $arr; array_splice($lin,$key,1); for($l=0;$l$c-1;$l++) { $...