find the second occurrence of a char in a string php

Question

Imagine i have this string :

$info="portugal,alemanha,belgica,porto 1-0 alemanha, belgica 2-0";

I want to know the position of the 2nd char "-", so i want the result 2-0 and not the result 1-0.

I'm using this function, but it's always returning the first position,

$pos = strpos($info, '-');

Any idea? Thanks

See also https://stackoverflow.com/questions/3126324/question-about-strpos-how-to-get-2nd-occurrence-of-the-string/18589825 — caw, Dec 30 '18 at 01:49

Rijk · Answer 1 · 2016-10-17T09:56:13.747

26

Simplest solution for this specific case is to use the offset parameter:

$pos = strpos($info, '-', strpos($info, '-') + 1);

You might want to look into using regular expressions, though.

edited Oct 17 '16 at 09:56

answered Nov 21 '12 at 12:00

Rijk

6

shouldn't it be "strpos($info, '-', strpos($info, '-')+1)"? – Jesse Aug 13 '13 at 14:44
just tested, it behaves well even if the string contains zero or just one character. e.g: returns false as expected with no errors. – d.raev Jan 10 '17 at 12:09
2

For some search strings (`$needle`) you may need `+ strlen($info)` instead of just `+ 1`. – caw Dec 30 '18 at 01:49

score 8 · Accepted Answer · edited Nov 21 '12 at 13:35

8

Try this

preg_match_all('/-/', $info,$matches, PREG_OFFSET_CAPTURE);  
echo $matches[0][1][1];

edited Nov 21 '12 at 13:35

answered Nov 21 '12 at 13:13

user1835851

16

Try not to answer with just a block of code: add some description of your solution. – Artemix Nov 21 '12 at 13:36
worked, now to understand, you put the regular expression '/-/', so the char '/' represent some char before - and after, right? What is the meaning of PREG_OFFSET_CAPTURE? and why $matches[0][1][1] Thank you for the solution – unpix Nov 21 '12 at 14:24
7

Old thread, but this is largely unhelpful due to a lack of explanation on how to navigate the data, so I'll provide it: Firstly, the PREG_OFFSET_CAPTURE flag turns the results into an array that captures the position of the found string. To get the first match, you'd use $matches[0][0], the third match you'd use $matches[0][2], etc. In this case, $matches[0][1] gets the second match. That match is (thanks to PREG_OFFSET_CAPTURE) an array with two values. $matches[0][1][0] returns just the string that was found ("-"). $matches[0][1][1] returns the position/offset of that string. – Tom Walker Jul 14 '16 at 22:53

score 0 · Answer 3 · edited Nov 18 '17 at 20:40

0

You have to use offset parameter

$pos = strpos($info, '-', [offset]);

It will work perfectly.

edited Nov 18 '17 at 20:40

Andreas

answered Nov 21 '12 at 12:12

som

15

`offset` specifies the number of characters to skip before looking, not the number of `needle` occurrences to skip – Leigh Nov 21 '12 at 12:29

3 Answers3