PHP の中国語と英語が混在した文字列インターセプト関数コード

复制代码代码如下:

function get_word($string, $length, $dot = '..',$charset=' gbk') {
if(strlen($string) return $string;
}
$string = str_replace(array(' ',' ', '&', '"', '<', '>'), array('','','&' 、'"'、'<'、'>')、$string);
$strcut = '';
if(strto lower($charset) == 'utf-8') {
$n = $tn = $noc = 0;
while($n < strlen($string)) {
$t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
$tn = 1; $n ; $noc ;
} elseif(194 <= $t && $t <= 223) {
$tn = 2; $n = 2; $noc = 2;
} elseif(224 <= $t && $t <239) {
$tn = 3; $n = 3; $noc = 2;
} elseif(240 <= $t && $t <= 247) {
$tn = 4; $n = 4; $noc = 2;
} elseif(248 <= $t && $t <= 251) {
$tn = 5; $n = 5; $noc = 2;
} elseif($t == 252 || $t == 253) {
$tn = 6; $n = 6; $noc = 2;
} else {
$n ;
}
if($noc >= $length) {
break;
}
}
if($noc > $length) {
$n -= $tn;
}
$strcut = substr($string, 0, $n);
} else {
for($i = 0; $i $strcut .= ord($string[$i]) > 127 ? $string[$i].$string[ $i] : $string[$i];
}
}
return $strcut.$dot;
}
$str = "欢迎訪問简明nowamagic";
$str_result = get_word($str, 12);
エコー $str_result;

测试运行结果：
欢迎訪問..