php - capturing group under capturing group? -


is possible capturing group under capturing group can have array that

regex = (asd1).(lol1),(asd2).(asd2)

string = asd1.lol1,asd2.lol2

  • return_array[0]=>group[0]='asd1';
  • return_array[0]=>group[1]='lol1';
  • return_array[1]=>group[0]='asd2';
  • return_array[1]=>group[1]='lol2';

while using regular expressions can want, use strtok() iterate through seems comma separated sets:

$results = array(); $str = 'asd1.lol1,asd2.lol2';  $token = strtok($str, ','); while ($token !== false) {     $results[] = explode('.', $token, 2);     $token = strtok(','); }

output:

array (     [0] => array         (             [0] => asd1             [1] => lol1         )     [1] => array         (             [0] => asd2             [1] => lol2         ) )

with regular expressions pattern needs include 2 terms surrounding period, i.e.:

$pattern = '/(?<=^|,)(\w+)\.(\w+)/'; preg_match_all($pattern, $str, $result, preg_set_order);

the (?<=^|,) look-behind assertion; makes sure match comes after if preceded either start of search string or comma, doesn't "consume" anything.

output:

array (     [0] => array         (             [0] => asd1.lol1             [1] => asd1             [2] => lol1         )     [1] => array         (             [0] => asd2.lol2             [1] => asd2             [2] => lol2         ) )

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