Questions about the group of string variables

Asking questions about string variable groups
$s = "Serial number: JH0019 Status: Processing Grade: High time: 2013-05-28-12:55:29"

How to convert the array structure to
Array
[Serial number]=>jh0019
[Status]=> in Process
[Level]=> High
[Time]=>2013-05-28 12:55:29
)
My train of thought is:
Change the "" First |
Then the | | Change |
Re: | change:
Re-put |: change:
But the space in the time and the space in the middle of the serial number I don't know how to get rid of it.
Finally with
$a =array ();
foreach (Explode (' | ', $s) as $s) {
List ($k, $v) =explode (': ', $s);
$a [$k]= $v;}
I have coase dizzy, how can get results, please help, thank you

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------Solution--------------------

$s = "Serial number: JH0019 Status: Processing  grade: High time: 2013-05-28 12:55:29";
$a = Preg_split ('/:\s* ([\d:-]+
------Solution--------------------

------Solution--------------------
Preg_split_no_empty);
foreach (Array_chunk ($a, 2) as $r) {
  $res [Preg_replace ('/\s
------Solution--------------------
/', ', $r [0])] = $r [1];
}

Print_r ($res);

Array
(
[Serial number] = JH0019
[Status] = in process
[Rank] = high
[Time] = 2013-05-28 12:55:29
)

------Solution--------------------

 
 $s = "Serial number: JH0019 Status: Processing Grade: High time: 2013-05-28 12:55:29"; 
 Preg_match_all ('/([^:]+): ([^\s]+)/', $s, $m); 
 Echo ' 
 Var_dump ($m); 
 
/** 
 Output: 
 Array (3) {
 [0]=> 
 Array (3) {
 [0]=> 
 String (20) "Serial Number: JH0019" 
 [ 1]=> 
 String (24) "Status: In Process" 
 [2]=> 
 String (15) "Level: High" 
} 
 [1]=> 
 Array (3) {
 [0]=> 
 String (11) "Serial number" 
 [1]=> 
 String (12) "state" 
 [2]=> 
 String (9) "level "
} 
 [2]=> 
 Array (3) {
 [0]=> 
 String (6)" JH0019 "
 [1]=> 
 String (9)" In Process "
 [2]=> 
 String (3) "High" 
} 
} 
 */
 
 
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