PHP Mb_strlen () Chinese-English mixed character intercept code _php tutorial

Note: If the fatal error:call to undefined function Mb_strlen appears with Mb_strlen, you can use info () to see if there is no load mbstring, if not, try to Php_ Mbstring.dll Copy to the%windows% directory

File Encoding Utf-8

$var = ' Chinese characters abc ';
Mb_strlen ($var, ' utf-8 '); Output 7 Chinese and English are one byte
Mb_strlen ($var); Output 15 Chinese to 3 bytes English takes one byte
Mb_strlen ($var, ' GBK '); Output 9 not normal

Take all Chinese

function Utf8substr ($str, $from, $len) {return preg_replace (' #^ (?: [x00-x7f]|[ xc0-xff][x80-xbf]+) {0, '. $from. '} '. ' (?: [x00-x7f]| [Xc0-xff] [x80-xbf]+) {0, '. $len. '}). * #s ', ' $ ', $str); }

Chinese and English mixed body intercept code

function Gb2312_strlen ($string) {$str _len = strlen ($string); $str _count = 0;for ($j = 0; $j < $str _len; $j + +) {   if (ord ($string {$j}) < 127)   {    $str _count + = 1;    Continue;   }   else   {    if (ord ($string {$j +1}) > 127)    {     $str _count + = 1;     $j + +;     Continue;    }    else    {     $str _count + = 1;     Continue;}}}   return $str _count;} $STR = "Open s D";  echo Gb2312_strlen ($STR);

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