PHP开发：实现中文字串截取无乱码方法函数

function GBsubstr($string, $start, $length) {文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

if(strlen($string)>$length){文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

$str=null;文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

$len=$start+$length;文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

for($i=$start;$i<$len;$i++){文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

if(ord(substr($string,$i,1))>0xa0){文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

$str.=substr($string,$i,2);文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

$i++;文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

}else{文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

$str.=substr($string,$i,1);文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

}文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

}文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

return $str.'...';文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

}else{文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

return $string;文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

}文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html

}文章源自菜鸟学院-https://www.cainiaoxueyuan.com/bc/9888.html