Splitting string array based upon digits in php?

Question

I have a string

 $str = "101WE3P-1An Electrically-Small104TU5A-3,Signal-Interference Duplexers Gomez-GarciaRobertoTU5A-3-01"

I want to split this string by the numbers, eg:"101WE3P-1An.... "should be first element, "104TUA..." should be second element?

Somebody wrote me the following code in my previous question preg_match to match substring of three numbers consecutively? some little minutes ago:

$result = preg_split('/^\d{3}$/', $page, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

Baseline is i want to match three digited number followed by any no of capitals, followed by anything including \t ? Thanks in advance.

Could you clarify what **exactly** should be the result of `$str` after extract? It's not clear for me.. (too much `...`) — j0k, Dec 31 '12 at 13:37
That's not the question. Let be simple. Take `$str="a b c d"`. If you want to split this string by space, it means you want `a`, `b`, `c`, `d`. Right? So what do you want **at the end** ? — j0k, Dec 31 '12 at 13:40
Not by space. i want to split by three digit no followed by capital letter followed by anything.. — Aditya, Dec 31 '12 at 13:47

score 5 · Accepted Answer · answered Dec 31 '12 at 13:46

5

You can tell preg_split() to split at any point in the string which is followed by three digits by using a lookahead assertion.

$str = "101WE3P-1An Electrically-Small104TU5A-3,Signal-Interference Duplexers Gomez-GarciaRobertoTU5A-3-01";
$result = preg_split('/(?=\d{3})/', $str, -1, PREG_SPLIT_NO_EMPTY);

var_export($result);

Gives the following array:

array (
  0 => '101WE3P-1An Electrically-Small',
  1 => '104TU5A-3,Signal-Interference Duplexers Gomez-GarciaRobertoTU5A-3-01',
)

The PREG_SPLIT_NO_EMPTY flag is used because the very start of the string is also a point where there are three digits, so an empty split happens here. We could alter the regex to not split at the very start of the string but that would make it a little more difficult to understand at-a-glance, whereas the flag is very clear.

answered Dec 31 '12 at 13:46

salathe

51,324
12
104
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Nice one, can you tell me why you used var_export? – Aditya Dec 31 '12 at 13:51
@Aditya to show you the resulting array, no other reason. – salathe Dec 31 '12 at 13:51
But there seems to be a problem with a bigger string that im taking from a text file! – Aditya Dec 31 '12 at 13:56
Oh noes! How about asking a new question detailing your "problem" (in the form of a question) with reference to that "bigger string"? Comments aren't the place to bounce back and forth support questions (try chat). – salathe Dec 31 '12 at 13:58
Ok..simple i want to match three digited number follwed by a capital letter followed by anything(including a \t)? :) – Aditya Dec 31 '12 at 14:06
I want a pony and a plastic rocket. However, here is not the right place for either of us to be sharing what we *want*. – salathe Dec 31 '12 at 14:14
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/21956/discussion-between-aditya-and-salathe) – Aditya Dec 31 '12 at 14:28

score -1 · Answer 2 · answered Dec 31 '12 at 13:48

-1

I tried match rather than split

preg_match_all('/^(\d{3}.*?)*$/', $str, $matches);
var_dump($matches);

Seems to get correct result for your sample

answered Dec 31 '12 at 13:48

user1938139

141
1
5

Splitting string array based upon digits in php?

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