PHP - Select part of a string between two characters

Question

I've been doing research into this and I believe the answer is do to with regular expressions but I just can't get my head around them.

I have a number of strings and I need to select a number between two characters. Here is an example string

&user18339=18339,20070103,175439,pmt,793,A/3/1/2,335,793,A/3/1/2,

I need the number that occurs after A/3/1/2, and before the following ,

In this example I need to select 335. I can do this using explode however I run into problems when I need to get more than one number from a string, like in the example below.

Here is another example string

&user31097=31097,20070105,092612,pmt,4190,A/3/1/2,142,1162,A/3/1/1,22,2874,A/3/1/2,1046,4622,A/3/1/2,25,2872,A/3/1/2,

Again I need to get the numbers after the A/3/1/2, and before the following ,. So in this example I would want to take 142, 1046 and 25.

If anyone could let me know how to do this it would be greatly appreciated.

You have several occurrences of "A/3/1/2" in your examples, and did not specify what to do with that. — Lightness Races in Orbit
– Lightness Races in Orbit, Commented Jan 4, 2011 at 11:17
Is it always the "integer" that follows an "A/#/#/#" sequence after the "pmt" string? (e.g. there could be 1, 2, n occurrences?) — scunliffe
– scunliffe, Commented Jan 4, 2011 at 11:17

Poelinca Dorin · Accepted Answer · 2011-01-04 11:19:00Z

3

$string = '&user31097=31097,20070105,092612,pmt,4190,A/3/1/2,142,1162,A/3/1/1,22,2874,A/3/1/2,1046,4622,A/3/1/2,25,2872,A/3/1/2,';
preg_match_all('/A\/3\/1\/2,([0-9]*?),/', $string, $matches);
var_dump($matches);

answered Jan 4, 2011 at 11:19

Poelinca Dorin

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1 Comment

Brock Adams Over a year ago

@JWH89, If this answer works for you, you should check-mark it as answered. Also, please up-vote any answers that were helpful to you. If an answer was not helpful, comments -- as to why it didn't work for you -- help everyone figure out the best answer.

rik · Accepted Answer · 2011-01-04 11:19:23Z

2

preg_match_all('/A\/3\/1\/2,([^,]+),/', $input, $matches = array());
print_r($matches);

answered Jan 4, 2011 at 11:19

rik

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Poelinca Dorin Over a year ago

[^,] will match anything until "," witch will match a string too , hes asking how to retrive the number not everithing .

codaddict · Accepted Answer · 2011-01-04 11:19:28Z

1

if(preg_match_all('#A/3/1/2,([^,]*),#',$str,$matches)) {                        
        // $matches[1] will have the required results.
}

See it in action

answered Jan 4, 2011 at 11:19

codaddict

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1 Comment

Poelinca Dorin Over a year ago

[^,] will match anything until "," witch will match a string too , hes asking how to retrive the number not everithing .

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