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  1. <?php
  2.  
  3. $results = [];
  4. $string = "@friends @john [quote]@and @jane[/quote] @doe";
  5. $rx = '~(\[quote\](?:(?1)|.)*?\[/quote])(*SKIP)(*F)|@\w+~s';
  6. preg_match_all($rx, $string, $results);
  7. print_r($results[0]);
Success #stdin #stdout 0.02s 23836KB
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stdin
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Standard input is empty
stdout
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Array
(
    [0] => @friends
    [1] => @john
    [2] => @doe
)
https://ideone.com/j1Cc1C
language:
PHP (php 7.3.5)
created:
7 years ago
visibility:
secret

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