Detailed Chinese interception function mb_substr() in php_PHP tutorial

Since Chinese characters are two bytes, you cannot use substr() like English and numbers. This will cause garbled characters. Fortunately, there is the mb_substr() function in PHP to handle this problem. Friends in need can take a look.

1. Chinese interception: mb_substr()

mb_substr( $str, $start, $length, $encoding )

$str, the string that needs to be truncated
$start, the beginning of truncation, the starting point is 0
$length, the number of words to be intercepted
$encoding, web page encoding, such as utf-8, GB2312, GBK

Example:

$str, the string to calculate the length

The code is as follows

代码如下	复制代码
$str='电影618：http://www.bKjia.c0m'; echo mb_substr($str,0,5,'utf-8');//截取头5个字，假定此代码所在php文件的编码为utf-8 ?>

Copy code

$str='Movie 618: http://www.bKjia.c0m';

echo mb_substr($str,0,5,'utf-8');//Intercept the first 5 words, assuming that the encoding of the php file where this code is located is utf-8

?>

The results show: Movie 618

代码如下	复制代码
$str='电影618：http://www.hzhuti.com'; echo mb_strlen($str,'utf-8');//假定此代码所在php文件的编码为utf-8 ?>

2. Get the Chinese length: mb_strlen()

mb_strlen( $str, $encoding )

$encoding, web page encoding, such as utf-8, GB2312, GBK

Example:

The code is as follows

Copy code

$str='Movie 618: http://www.hzhuti.com'; echo mb_strlen($str,'utf-8');//Assume that the encoding of the php file where this code is located is utf-8 ?> The result shows: 29 http://www.bkjia.com/PHPjc/632257.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/632257.htmlTechArticleBecause Chinese is two bytes, you cannot use substr() like English and numbers. This will cause garbled characters. Fortunately, there is the mb_substr() function in PHP to handle this problem. Friends in need can take a look. ...