This article mainly introduces the method of custom intercepting Chinese strings in PHP, which has a very good reference value. Let’s take a look at it with the editor.
First of all, please explain: There are currently a lot of codes for this problem on the Internet. , but many of them are copied and pasted without practice by myself, and the code has logic problems. The following code is written by myself.
Not much to say
/** * 该函数是对于utf8编码 * @author 2582308253@qq.com * @param string $str * @param int $start * @param int $length * @return string * @copyright 2017年2月27日下午1:46:10 */ function gbsubstr2($str, $start, $length) { $length = abs($length); $strLen = strlen($str); $len = $start + $length; $newStr = ''; for($i = $start; $i < $len && $i < $strLen; $i++) { if(ord(substr($str, $i, 1)) > 0xa0) { //utf8编码中一个汉字是占据3个字节的,对于其他的编码的字符串,中文占据的字节各有不同,自己需要去修改这个数a $newStr .= substr($str, $i, 3);//此处a=3; $i+=2; $len += 2; //截取了三个字节之后,截取字符串的终止偏移量也要随着每次汉字的截取增加a-1; } else { $newStr .= substr($str, $i, 1); } } return $newStr; }
The above is the entire content of this article, I hope it will be helpful to everyone’s study .
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