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function str_cut($string,$length,$rephtml=0,$dot='...',$pagechar='utf8'){
$rep_str1 = array(' ','&','"','<','>',''','“','”','·','—');
$rep_str2 = array(' ','&','"','<','>',"'","“","”","·","—");
if($rephtml==0) {
$string = htmlspecialchars_decode($string);
$string = str_replace($rep_str1 , $rep_str2, $string);
$string = strip_tags($string);
}
$string = preg_replace("/\s/", " ", $string);
$string = preg_replace("/^ +| +$/", '', $string);
$string = preg_replace("/ {2,}/is", " ", $string);
$strlen = strlen($string);
if($strlen<=$length){
return $string;
}
$strcut = '';
if($pagechar == 'utf8') {
$n = $tn = $noc = 0;
while($n < $strlen) {
$t = ord($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; $isdot = 1; }
}
if($noc > $length) { $n -= $tn; }
$strcut = substr($string, 0, $n);
if ($n < $strlen) {
$strcut = $strcut.$dot;
}
} else {
for($i = 0; $i < $length; $i++) {
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
}
if($rephtml==0){
$string = str_replace($rep_str2, $rep_str1, $string);
}
return $strcut;
}
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