PHP utf-8 Chinese interception without garbled characters (string judgment version)

/*E4 B8 AD E5 9B BD   中国
1110 0100    10111000   10101101
1110 0101    1001101110111101

61  a
0011 1101


0xxx xxxx ,1个字节
110xx xxxx , 2个字节
1110 xxxx, 3
1111 0xxxx 4...
*/<pre name="code" class="php">$str = '中华人aaa民共b和国,c万岁';

function utf8sub($str,$len){
	if($len ';
		if(strlen($heigh)<br><pre class="brush:php;toolbar:false">

The above introduces PHP utf-8 Chinese interception without garbled characters (string judgment version), including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.