How to get the length of a string in PHP

Getting the length of a string is implemented using the strlen() function.

The syntax is as follows:

int strlen(string str)

Test:

$str="123abc ,.;";
echo strlen($str);

The results are as follows

10

$str="107网站工作室";
echo strlen($str);

The results are as follows:

18

There will be questions at this time, a total of 8 characters , why the displayed length is 18, because in the case of UTF-8 encoding, three characters are one Chinese character, 3+5*3=18;

Then the question is, can the number of characters in the string be displayed? Well, for example, 8 in this example

At this time, a simple way is to extend php.ini, remove the semicolon in front of extension=php_mbstring.dll, and then restart Apache

$str="107网站工作室";
echo mb_strlen($str,"UTF-8");

. The result of running is as follows

8

mixedmb_strlen ( string$str [, string$encoding = mb_internal_encoding() ] )

The encoding parameter is the character encoding. If omitted, the internal character encoding is used.

The above introduces how to get the length of a string in PHP, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.