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  1. <?php
  2.  
  3. $re = "/#[0-9_\\p{L}]+/u"; 
  4. $str = "This is my testing string, look at the hashtags and see that the multibyte ones are ignored. #php #regex #my #multibyte #åäö #öl #läsa #drickaöl #tags #are #being #ignored"; 
  5. preg_match_all($re, $str, $matches);
  6. print_r($matches);
Success #stdin #stdout 0.02s 24144KB
comments (?)
stdin
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Standard input is empty
stdout
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Array
(
    [0] => Array
        (
            [0] => #php
            [1] => #regex
            [2] => #my
            [3] => #multibyte
            [4] => #åäö
            [5] => #öl
            [6] => #läsa
            [7] => #drickaöl
            [8] => #tags
            [9] => #are
            [10] => #being
            [11] => #ignored
        )

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

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