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  1. <?php
  2. declare(encoding='UTF-8');
  3.  
  4. $s = 'Привет, мир!';
  5.  
  6. var_dump(strlen($s));
  7. var_dump(mb_strlen($s));
  8.  
Success #stdin #stdout #stderr 0.02s 52432KB
comments ()
stdin 
Standard input is empty
stdout 
int(21)
int(12)
stderr 
PHP Warning:  declare(encoding=...) ignored because Zend multibyte feature is turned off by settings in /home/hhuDtK/prog.php on line 2
https://ideone.com/5VuY5Z
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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