(PHP 4 >= 4.2.0, PHP 5, PHP 7)
mb_ereg — Regular expression match with multibyte support
$pattern
   , string $string
   [, array &$regs
  ] ) : intExecutes the regular expression match with multibyte support.
patternThe search pattern.
stringThe search string.
regs
       If matches are found for parenthesized substrings of
       pattern and the function is called with the
       third argument regs, the matches will be stored
       in the elements of the array regs.
       If no matches are found, regs is set to an empty
       array.
      
$regs[1] will contain the substring which starts at the first left parenthesis; $regs[2] will contain the substring starting at the second, and so on. $regs[0] will contain a copy of the complete string matched.
   Returns the byte length of the matched string if a match for
   pattern was found in string,
   or FALSE if no matches were found or an error occurred.
  
   If the optional parameter regs was not passed or
   the length of the matched string is 0, this function returns 1.
  
| Version | Description | 
|---|---|
| 7.1.0 | mb_ereg() will now set regsto
       an empty array, if nothing matched. Formerly,regswas not modified in that case. | 
Note:
The internal encoding or the character encoding specified by mb_regex_encoding() will be used as the character encoding for this function.