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  1. <?php
  2.  
  3. $re = '~c(?<start>\d+(?:\[\d+])?)(?:-(?<end>(?&start)?))?~'; 
  4. $str = "c2,c3-5,c6[2],c8[4]-10,c14-21[5]"; 
  5. preg_match_all($re, $str, $matches);
  6. $res = array_map(function($ms, $me) { 
  7. 	return array("start" => $ms, "end" => $me);
  8. }, $matches["start"], $matches["end"]);
  9. print_r($res);
Success #stdin #stdout 0.02s 52472KB
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Standard input is empty
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Array
(
    [0] => Array
        (
            [start] => 2
            [end] => 
        )

    [1] => Array
        (
            [start] => 3
            [end] => 5
        )

    [2] => Array
        (
            [start] => 6[2]
            [end] => 
        )

    [3] => Array
        (
            [start] => 8[4]
            [end] => 10
        )

    [4] => Array
        (
            [start] => 14
            [end] => 21[5]
        )

)
https://ideone.com/ui4XIX
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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