PHP - 选择两个字符之间的字符串的一部分

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.

Answer 1

$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);

Answer 2

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

Answer 3

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

See it in action