Editing Count number of characters (section)

== How to count characters with PHP ==
* PHP: [https://www.php.net/manual/en/function.strlen.php strlen] & [http://php.net/mb_strlen PHP mb_strlen function]

Number of characters
<pre>
echo mb_strlen("狐", 'UTF-8') . PHP_EOL; // return 1
echo mb_strlen("《王大文 Dawen》", 'UTF-8') . PHP_EOL; // return 11
</pre>

String length (number of bytes)
<pre>
echo strlen("狐") . PHP_EOL; // return 3
echo strlen("《王大文 Dawen》") . PHP_EOL; // return 21
</pre>

Number of words {{exclaim}} [https://www.php.net/manual/en/function.str-word-count.php str_word_count] function not support Chinese characters
<pre>
echo str_word_count("The quick brown fox jumps over the lazy dog"); // return 9
echo str_word_count("敏捷的棕毛狐狸從懶狗身上躍過"); // return 0
</pre>