php教程 截取一定长度的字符串（该函数对gb2312使用有效
function ssubstr($string, $length, $dot = ' ...') {
global $charset;if(strlen($string) return $string;
}
$string = str_replace(array('&', '"', ''), array('&', '"', ''), $string);
$strcut = '';
if(strtolower($charset) == 'utf-8') {
$n = $tn = $noc = 0;
while($n $t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 $tn = 1; $n++; $noc++;
} elseif (194 $tn = 2; $n += 2; $noc += 2;
} elseif (224 $tn = 3; $n += 3; $noc += 2;
} elseif (240 $tn = 4; $n += 4; $noc += 2;
} elseif (248 $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];
}
}
$strcut = str_replace(array('&', '"', ''), array('&', '"', ''), $strcut);
return $strcut.$dot;
}
截取一定长度的字符串（该函数对gb2312使用有效）
function wordscut($string, $length ,$sss=0) {if(strlen($string) > $length) {
if($sss){
$length=$length - 3;
$addstr=@# ...@#;}
for($i = 0; $i if(ord($string[$i]) > 127) {
$wordscut .= $string[$i].$string[$i + 1]; //
$i++;
} else {
$wordscut .= $string[$i];
}
}
return $wordscut.$addstr;
}
return $string;
}
?>
