PHP中文字符串截取函数

<?php
function cnSubStr($string,$sublen)
{
if($sublen>=strlen($string))
{
return $string;
}
$s=””;
for($i=0;$i<$sublen;$i++)
{
if(ord($string{$i})>127)
{
$s.=$string{$i}.$string{++$i};
continue;
}else{
$s.=$string{$i};
continue;
}
}
return $s;
}// End Function cnSubStr($string,$sublen)

/////////// Use like this :

echo “<p>__________________________<p>”;
$string=”242432夺取克格勃克格勃中工二进制夺取7890″;
$sublen=strlen($string);
$len=20;
echo $string.”<p>”;
echo “总长为：”.($sublen+1).”<p>”;
echo “截取数：”.$len.”<p>”;

for($i=1;$i<=$sublen+1;$i++){
if($i>$len){
echo $i.”<b> →</b> “.cnSubStr($string,$i).”…<br>”;
continue;
}
echo $i.”<b> →</b> “.cnSubStr($string,$i).”<br>”;
}

?>