Get the natural length of strings containing Chinese and English

Test the awareness of encoding

Code example:

$str = '大家好abc';
echo strlen($str);
echo '<br/>';
echo mb_strlen($str,'utf-8');

The result is 12, 6

• ##strlen() calculates the string Number of bytes, one English character is 1 byte, Chinese character is 2 bytes under GBK encoding, UTF8 is 3 bytes, so the number of bytes is 3*3+3 = 12

• mb_strlen() requires mb_string extension, mixed mb_strlen ( string $str [, string $encoding = mb_internal_encoding() ] ), the first parameter is the string to be detected, the second parameter is the encoding format, multi-byte Characters are recorded as 1

$str = '大家好abc';
echo strlen($str);
echo '<br/>';
echo mb_strlen($str,'utf-8');

• strlen() calculates the number of bytes of the string. An English character is 1 byte, a Chinese character is 2 bytes in GBK encoding, and UTF8 is 3 characters. section, so the number of bytes is 3*3+3 = 12

• mb_strlen() requires mb_string extension, mixed mb_strlen ( string $str [, string $encoding = mb_internal_encoding() ] ) , the first parameter is the string to be detected, the second parameter is the encoding format, multi-byte characters are recorded as 1