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  1. <?php
  2.  
  3. $re = '/(?<=\(|^)([^()]*)/'; 
  4. $str = "0A,0B(1A((3A, 3B, 3C)))"; 
  5. preg_match_all($re, $str, $matches);
  6. $res  = array();
  7. foreach ($matches[1] as $m){
  8. 	$res[] = preg_split('/\s*,\s*/',$m);
  9. }
  10. print_r($res);
Success #stdin #stdout 0.02s 24448KB
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stdin
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Standard input is empty
stdout
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Array
(
    [0] => Array
        (
            [0] => 0A
            [1] => 0B
        )

    [1] => Array
        (
            [0] => 1A
        )

    [2] => Array
        (
            [0] => 
        )

    [3] => Array
        (
            [0] => 3A
            [1] => 3B
            [2] => 3C
        )

)
https://ideone.com/b2mrUo
language:
PHP (php 7.3.5)
created:
10 years ago
visibility:
secret

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