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  1. <?php
  2. $text = "лол";
  3. $count = (mb_strlen($text));
  4. echo "$count";
  5. ?>
Runtime error #stdin #stdout #stderr 0.04s 23428KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
PHP Fatal error:  Uncaught Error: Call to undefined function mb_internal_encoding() in /home/0uGWDn/prog.php:3
Stack trace:
#0 {main}
  thrown in /home/0uGWDn/prog.php on line 3