PHP切割汉字
0xa0) //ord()函数返回字符串的第一个字符的ASCII值
{
$tmpstr .= substr($str, $i, 2);
$i++;
} else {
$tmpstr .= substr($str, $i, 1);
}
}
return $tmpstr;
}
/\*----------------------------第二种方法-----------------------------------\*/
//截取的是UTF-8字符串
function utf\_substr($str, $len)
{
$new\_str = \[\];
for ($i = 0; $i < $len; $i++) {
$tem\_str = substr($str, 0, 1);
if (ord($tem\_str > 127)) {
$i++;
if ($i < $len) {
$new\_str\[\] = substr($str, 0, 3);
$str = substr($str, 3);
}
} else {
$new\_str\[\] = substr($str, 0, 1);
$str = substr($str, 1);
}
}
return join($new\_str);//join()函数把数组元素组合为一个字符串
}
/\*-------------------------------------第三种方法(UTF-8)--------------------------------\*/
function cutstr($string, $length)
{
preg\_match\_all("/\[\\x01-\\x7f\]|\[\\xc2-\\xdf\]|\[\\x80-\\xbf\]|\\xe0\[\\xa0-\\xbf\]\[\\x80-\\xbf\]|\[\\xe1-\\xef\]\[\\x80-\\xbf\]\[\\x80-\\xbf\]|\\xf0\[\\x90-\\xbf\]\[\\x80-\\xbf\]\[\\x80-\\xbf\]|\[\\xf1-\\xf7\]\[\\x80-\\xbf\]\[\\x80-\\xbf\]\[\\x80-\\xbf\]/", $string, $info);
$wordscut = "";
$j = 0;
for ($i = 0; $i < count($info\[0\]); $i++) {
$wordscut .= $info\[0\]\[$i\];
$j = ord($info\[0\]\[$i\]) > 127 ? $j + 2 : $j + 1;
if ($j > $length - 3) {
return $wordscut . "...";
}
}
return join('', $info\[0\]);
}
$string = "312哈哈，这个组合很难切割哦";
echo cutstr($string, 10);
/\*---------------------------------下面是曾经用过的截取第三个的字符串的------------------------------\*/
// $name1 = mysql\_result($my\_rst,0,"name");
// $name = preg\_match("/(\[1-9\]\[0-9\]+)/",$name1,$r);
// $name = $r\[0\];
// if($name == ""){
// $name=preg\_replace('#^(?:\[\\x00-\\x7F\]|\[\\xC0-\\xFF\]\[\\x80-\\xBF\]+){0,2}'.
// '((?:\[\\x00-\\x7F\]|\[\\xC0-\\xFF\]\[\\x80-\\xBF\]+){0,1}).\*#s',
// '$1',$name1);
// }
/\*--------------------------------------------第四种方法(UTF-8)---------------------------------------------\*/
function cut\_str($sourcestr, $cutlength)
{
$returnstr = '';
$i = 0;
$n = 0;
$str\_length = strlen($sourcestr);//字符串的字节数
while ($n < $cutlength && $i <= $str\_length) {
$temp\_str = substr($sourcestr, $i, 1);
$ascnum = ord($temp\_str);//得到字符串中第$i位字符的ASCII码
if ($ascnum >= 224) {
$returnstr = $returnstr . substr($sourcestr, $i, 3);//根据UTF-8编码规范，将3个连续的字符计为单个字符
$i = $i + 3;//实际Byte记为3
$n++;//字串长度为1
} elseif ($ascnum >= 192)//如果ASCII位高于192
{
$returnstr = $returnstr . substr($sourcestr, $i, 2);//根据UTF-8编码规范，将2个连续的字符记为单个字符
$i = $i + 2;//实际Byte记为2
$n++;//字串长度为1
} elseif ($ascnum >= 65 && $ascnum <= 90)//如果是大写字母
{
$returnstr = $returnstr . substr($sourcestr, $i, 1);
$i = $i + 1;//byte记为1
$n++;//但考虑到整体美观，大写字母计成一个高位字符
} else {
$returnstr = $returnstr . substr($sourcestr, $i, 1);
$i = $i + 1;//实际的Byte记为1
$n = $n + 0.5;//小写字母和半角标点等与半个高位字符宽...
}
}
if ($str\_length > $cutlength) {
$returnstr = $returnstr . "...";//超过长度时在尾处加上省略号
}
return $returnstr;
}
/\*--------------------第五种方法（UTF-8）---------------------------------------------\*/
function FSubstr($title, $start, $len = "", $magic = true)
{
if ($len == "") $len = strlen($title);
if ($start != 0) {
$startv = ord(substr($title, $start, 1));
if ($startv >= 128) {
if ($startv < 192) {
for ($i = $start - 1; $i > 0; $i--) {
$tempv = ord(substr($title, $i, 1));
if ($tempv >= 192) break;
}
$start = $i;
}
}
}
if (strlen($title) <= $len) return substr($title, $start, $len);
$alen = 0;
$blen = 0;
$realnum = 0;
$length = 0;
for ($i = $start; $i < strlen($title); $i++) {
$ctype = 0;
$cstep = 0;
$cur = substr($title, $i, 1);
if ($cur == "&") {
if (substr($title, $i, 4) == "<") {
$cstep = 4;
$length += 4;
$i += 3;
$realnum++;
if ($magic) {
$alen++;
}
} elseif (substr($title, $i, 4) == ">") {
$cstep = 4;
$length += 4;
$i += 3;
$realnum++;
if ($magic) {
$alen++;
}
} elseif (substr($title, $i, 5) == "&") {
$cstep = 5;
$length += 5;
$i += 4;
$realnum++;
if ($magic) {
$alen++;
}
} elseif (substr($title, $i, 6) == """) {
$cstep = 6;
$length += 6;
$i += 5;
$realnum++;
if ($magic) {
$alen++;
}
} elseif (preg\_match("/&#(\\d+);?/i", substr($title, $i), $match)) {
$cstep = strlen($match\[0\]);
$length += strlen($match\[0\]);
$i += strlen($match\[0\]) - 1;
$realnum++;
if ($magic) {
$blen++;
$ctype = 1;
}
}
} else {
if (ord($cur) >= 252) {
$cstep = 6;
$length += 6;
$i += 5;
$realnum++;
if ($magic) {
$blen++;
$ctype = 1;
}
} elseif (ord($cur) >= 248) {
$cstep = 5;
$length += 5;
$i += 4;
$realnum++;
if ($magic) {
$ctype = 1;
$blen++;
}
} elseif (ord($cur) >= 240) {
$cstep = 4;
$length += 4;
$i += 3;
$realnum++;
if ($magic) {
$blen++;
$ctype = 1;
}
} elseif (ord($cur) >= 224) {
$cstep = 3;
$length += 3;
$i += 2;
$realnum++;
if ($magic) {
$ctype = 1;
$blen++;
}
} elseif (ord($cur) >= 192) {
$ctype = 2;
$length += 2;
$i += 1;
$realnum++;
if ($magic) {
$blen++;
$ctype = 1;
}
} elseif (ord($cur) >= 128) {
$length += 1;
} else {
$cstep = 1;
$length += 1;
$realnum++;
if ($magic) {
if (ord($cur) >= 65 && ord($cur) <= 90) {
$blen++;
} else {
$alen++;
}
}
}
}
if ($magic) {
if (($blen \* 2 + $alen) == ($len \* 2)) break;
if (($blen \* 2 + $alen) == ($len \* 2) + 1) {
if ($ctype == 1) {
$length -= $cstep;
break;
} else {
break;
}
}
} else {
if ($realnum == $len) break;
}
}
unset($cur);
unset($alen);
unset($blen);
unset($realnum);
unset($ctype);
unset($cstep);
return substr($title, $start, $length);
}
function utf8Substr($str, $from, $len)
{
return preg\_replace('#^(?:\[\\x00-\\x7F\]|\[\\xC0-\\xFF\]\[\\x80-\\xBF\]+){0,' . $from . '}' .
'((?:\[\\x00-\\x7F\]|\[\\xC0-\\xFF\]\[\\x80-\\xBF\]+){0,' . $len . '}).\*#s',
'$1', $str);
}
$title = "你哈珀niad1纳斯达wop asdni你爱谁都没阿斯顿撒旦12ccs- sd";
$title = utf8Substr($title, 0, 15);
echo $title;
?>
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