Application example of php mb_substr() function to intercept Chinese strings

The

substr() function is used to intercept strings, but there will be problems with Chinese characters. The two functions mb_substr() and mb_strcut can be used. Here is an introduction to their specific usage

substr() function Used to intercept strings, but there will be problems with Chinese characters. The two functions mb_substr() and mb_strcut can be used. The usage is similar to substr(), except that one more parameter must be added at the end of the function to set the encoding of the string. , to use these two functions, you need to open php_mbstring.dll in php.ini.

<?php 
header("content-type:text/html; charset=utf-8");
$string = "你好我好大家好";
echo strlen($string).&#39;</br>&#39;;
echo mb_substr($string,0,4,&#39;utf-8&#39;).&#39;...</br>&#39;;
echo mb_strcut($string,0,4,&#39;utf-8&#39;).&#39;...&#39;;
?>

Output result:

21
Hello, I’m good...
You...

As can be seen from the above example, mb_substr splits characters by words, while mb_strcut splits characters by bytes, but neither will produce half a character.