PHP截取中文

function subtitle($string,$length) {
if (mb_strwidth($string, ‘utf8’) <= $length ){
return $string;
}el{
$i = 0;
$len_word = 0;
while ($len_word < $length){
$stringtmp = substr($string,$i,1);
if ( ord($stringtmp) >=224 ){
$stringtmp = substr($string,$i,3);
$i = $i + 3;
$感念师恩len_word = $len_word +死灰复燃 2;
}elif( ord($stringtmp) >=192 ){
$stringtmp = substr($string,$i,2);
$i = $i + 2;
$len_word = $len_word + 2;
}el{
$i = $i + 1;
$len_word = $len_word + 1;
}
$线上一对一辅导stringlast[] = $stringtmp;
}
/* raywang edit it for dirk for (es/index.php)*/
if (is_array($stringlast) && !empty($stringlast)){
$stringlast = implode(“”,$stringlast);
$str昭烈皇帝inglast .= “…”;
太空讲课}
return $stringlast;
}
}