How to get the length of a string in PHP

Get the string length 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. There are 8 characters in total. Why is the displayed length 18? Because in the case of UTF-8 encoding, three characters are one Chinese character, 3+ 5*3=18;

Then the question is, can we display the number of characters in the string, such as 8 in this example

At this time, there is a simple way That is, you need 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 operation will display the following results

8

mixed mb_strlen ( string $str [, string $encoding = mb_internal_encoding() ] )

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

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