How does php arrange and solve the problem in the order of 1, 2, 3, or 4, 5?

Php is arranged in the order of 1, 2, 3, or 4, 5. if there is a string of numbers 1, 2, 3, 7, 8, how can we divide 123 into a group, let's divide 7, 8 into another group, namely, separating 1, 2, 3 and 7.8 ------ solution ---------------------- $ s & nbsp; 1, 2, 3, 7, 8; $ ar & nbsp; & nbsp; explode (, & nbsp; $ php is arranged in the order of 1, 2, 3, or 4, and solved.
If there is a string of numbers 1, 2, 3, 7, 8, how can we divide 123 into one group, 7, 8 into another group, that is, separating 7.8, 3, and?
------ Solution ----------------------

$ S = '1, 2, 3, 7, 8 ';
$ Ar = explode (',', $ s );
$ Arr = array ();
Foreach ($ ar as $ v ){
$ C = count ($ arr );
If ($ v = 1
------ Solution ----------------------
($ V! = End ($ arr [$ C-1]) + 1 )){
$ Arr [] [] = $ v;
} Else {
$ Arr [$ C-1] [] = $ v;
}
}
Print_r ($ arr );

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

[1] => Array
(
[0] => 7
[1] => 8
)

)
------ Solution ----------------------

 $ S = '1, 2, 3, 7, 8 ';
$ Ar = explode (',', $ s );
$ Arr = array ();
Foreach ($ ar as $ v ){
$ C = count ($ arr );
If ($ v = 1
------ Solution ----------------------
($ V! = End ($ arr [$ C-1]) + 1 )){
$ Arr [] [] = $ v;
} Else {
$ Arr [$ C-1] [] = $ v;
}
}

$ One = implode (',', $ arr [0]);
$ Two = implode (',', $ arr [1]);

Echo "first winning streak:". $ one;
Echo"
";
Echo "second winning streak:". $ two;
?>

Running result:

First winning streak: 1, 2, 3
Second Winning streak: 7, 8