PHP string length function_PHP tutorial

PHP string length function, there are two functions to test the string length in PHP, one is strlen, the other is mb_strlen. The former one is supported by default, and the latter one needs to open a plug-in. Let's introduce the difference between the two functions. Application method. ​

php tutorial string length function, there are two functions to test the string length in php, one is strlen, the other is mb_strlen. The former one is supported by default, and the latter one needs to open a plug-in, as follows Let’s introduce the differences and application methods of the two functions.

php strlen() function
Definition and Usage
The strlen() function returns the length of a string.

Grammar
strlen(string) parameter description
string required. Specifies the string to check.

echo strlen("www.bkjia.com!"); //13
echo strlen("Chinese!");//6 The value obtained by strlen is twice the number of Chinese characters
?>

Try to copy php_mbstring.dll to the %windows% directory

$str = 'Everyone who knows PHP knows that strlen and mb_strlen are functions to find the length of a string';
echo strlen($str)'.
'.mb_strlen($str,'utf-8');
?>

Run the above code and the return value is as follows:
66
34

Everyone who knows PHP knows that strlen and mb_strlen are functions to find the length of a string, but for some beginners, if they don’t read the manual, they may not be clear about the difference.
Let’s look at this piece of code first (prerequisite: character encoding is utf-8):