<?
echo subHtml("<div><table>x<tr>1s<td>测你<input name='11'/>你好我也好我们是非常也好我们是非常好的非常这好似一也好我们是非常好的非常这好似一也好我们是非常好的非常这好似一也好我们是非常好的非常这好似一也好我们是非常好的非常这好似一也好我们是非常好的非常这好似一也好我们是非常好的非常这好似一好的非常这好似一个这是一个故事的故事试<td>124",30);
$newstext=stripcslashes()($navinfor['newstest']);
echo subHtml($newstext);
/**
* 截取HTML,并自动补全闭合
* @param $html
* @param $length_percent 默认截取30%
* @param $end
*/
function subHtml($html,$length_percent=30) {
$result = '';
$length=round(mstrlen($html)*$length_percent/100);
$tagStack = array();
$len = 0;
$contents = preg_split("~(<[^>]+?>)~si",$html, -1,PREG_SPLIT_NO_EMPTY| PREG_SPLIT_DELIM_CAPTURE);
foreach($contents as $tag)
{
if (trim($tag)=="")continue;
if(preg_match("~<([a-z0-9]+)[^/>]*?/>~si",$tag)){
$result .= $tag;
}else if(preg_match("~</([a-z0-9]+)[^/>]*?>~si",$tag,$match)){
if($tagStack[count($tagStack)-1] == $match[1]){
array_pop($tagStack);
$result .= $tag;
}
}else if(preg_match("~<([a-z0-9]+)[^/>]*?>~si",$tag,$match)){
array_push($tagStack,$match[1]);
$result .= $tag;
}else if(preg_match("~<!--.*?-->~si",$tag)){
$result .= $tag;
}else{
if($len + mstrlen($tag) < $length){
$result .= $tag;
$len += mstrlen($tag);
}else {
$str = msubstr($tag,0,$length-$len+1);
$result .= $str;
break;
}
}
}
while(!empty($tagStack)){
$result .= '</'.array_pop($tagStack).'>';
}
return $result;
}
function msubstr($string, $start, $length,$dot='',$charset = 'UTF-8') {
$string = str_replace(array('&', '"', '<', '>',' '), array('&', '"', '<', '>',' '), $string);
if(strlen($string) <= $length) {
return $string;
}
if(strtolower($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++;
} elseif(194 <= $t && $t <= 223) {
$tn = 2; $n += 2;
} elseif(224 <= $t && $t <= 239) {
$tn = 3; $n += 3;
} elseif(240 <= $t && $t <= 247) {
$tn = 4; $n += 4;
} elseif(248 <= $t && $t <= 251) {
$tn = 5; $n += 5;
} elseif($t == 252 || $t == 253) {
$tn = 6; $n += 6;
} else {
$n++;
}
$noc++;
if($noc >= $length) {
break;
}
}
if($noc > $length) {
$n -= $tn;
}
$strcut = substr($string, 0, $n);
} else {
for($i = 0; $i < $length; $i++) {
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
}
return $strcut.$dot;
}
/**
* 取得字符串的长度,包括中英文。
*/
function mstrlen($str,$charset = 'UTF-8'){
if (function_exists('mb_substr')) {
$length=mb_strlen($str,$charset);
} elseif (function_exists('iconv_substr')) {
$length=iconv_strlen($str,$charset);
} else {
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]/", $text, $ar);
$length=count($ar[0]);
}
return $length;
}
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