mb_substr Chinese interception knowledge_PHP tutorial

The mb_substr function is an upgraded version of the substr function. mb_substr supports Chinese interception and will not cause garbled characters. Let me introduce the basic knowledge of mb_substr.

Example

The code is as follows

代码如下	复制代码
$str = ‘这样一来我的字符串就不会有乱码^_^’; echo “mb_substr:” . mb_substr($str, 0, 7, ‘utf-8′); //结果：这样一来我的字 echo “ ”; echo “mb_strcut:” . mb_strcut($str, 0, 6, ‘utf-8′); //结果：这样 ?>

Copy code

$str = ‘This way my string will not be garbled^_^’;

echo “mb_substr:” . mb_substr($str, 0, 7, ‘utf-8′);

//Result: In this way, my words

echo “
”;

echo “mb_strcut:” . mb_strcut($str, 0, 6, ‘utf-8′);

//Result: like this

代码如下	复制代码
if(mb_strlen($str, "gbk") >20) {   $str = mb_substr($str, 0, 20, "gbk"); }

?>

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.

In actual use, it needs to be used in conjunction with mb_strlen. The usage of mb_strlen is similar to strlen, except that there is an additional encoding parameter: mb_strlen("I am the character whose length is to be calculated", "gbk"); the result is 11.

Detailed usage examples:
For example, if the string exceeds 20, it needs to be intercepted:

The code is as follows	Copy code

if(mb_strlen($str, "gbk") >20)

{

$str = mb_substr($str, 0, 20, "gbk"); } Note:

Make sure you have the php_mbstring.dll file under Windows/system32. If not, copy it from your Php installation directory extensions into Windows/system32.

2. Find php.ini in the windows directory, open it for editing, search for mbstring.dll, and find ;extension=php_mbstring.dll remove the previous; sign so that the mb_substr function can take effect http://www.bkjia.com/PHPjc/630698.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/630698.htmlTechArticleThe mb_substr function is an upgraded version of the substr function. mb_substr supports Chinese interception and will not cause garbled characters. Let me introduce it below Let’s take a look at the basic knowledge of mb_substr. Example code is as follows Copy the code...