Mb_strlen and strlen compute string length differences

Mb_strlen and strlen compute string length differences

Strlen
int strlen (String $string)

$str = ' 123456 ';
echo strlen ($STR); 6

$STR = ' AB CD http://www.jzread.com '/;
echo strlen ($STR); 20

$ch = ' China ';

echo strlen ($ch);//4

echo Utf8_strlen ($STR); 20
//

function Utf8_strlen ($STR)
{
$count = 0;

    for ($i = 0; $i < strlen ($STR); $i + +)
        {
        $value = Ord ($str [$i]);
        if ($value > 127)
             {
            if $value >= && $value <= 223)
                 $i + +;
            ElseIf ($value >= 224 && $value <= 239)
                $i = $i + 2 ;
            elseif ($value >= && $value <= 247)
                $i = $i + 3;
            Else
                 die (' Not a UTF-8 compatible string ');
           }
      
        $count + +;
        }
  
    return $count
}

Here's a look at the Mb_strlen example
echo ' <br/> ';
$STR = ' China ';
Echo Mb_strlen ($str, ' GBK '); 2 Length of 2, and just when we use strlen when the output of 4, from here can be seen Mb_strlen set his code for GBK when the Chinese processing.
Echo Mb_strlen ($str, ' utf8 ');//3

When we set the Mb_strlen parameter to be UFT8 encoded, his length was 3.

Take a look at the calculation of Chinese and English mixed-row string length instance

$STR = ' Construction Station teaching net http://www.jzread.com/original article ';
Calculated as follows
Echo (strlen ($STR) + Mb_strlen ($str, ' UTF8 '))/2;
Echo
Output results
10
/*
Strlen//Calculate string length, one Chinese when 2 characters
Mb_strlen//According to its character encoding mode, statistic character quot;
In the use of mb_strlen you must put the PHP tutorial. INI php_mbstring.dll front of the ";" Yes, but the general package is gone by default.
Original site article, reprinted annotated Source http://www.jzread.com/