两款php截取字符串函数_PHP教程

提供两款php教程 截取字符串函数，他们能自动识别中文哦，如果你是截取文章这个很不错啊，喜欢就进来看看吧。

header ( "content-type:text/html; charset=utf-8" );

function strcut($string, $length, $dot = '...',$charset='utf-8')
{

$strlen = strlen($string);

if($strlen <= $length) return $string;

$strcut = '';

if(strtolower($charset) == 'utf-8')

{

$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 += 3;

} elseif(240 <= $t && $t <= 247) {

$tn = 4; $n += 4; $noc += 4;

} elseif(248 <= $t && $t <= 251) {

$tn = 5; $n += 5; $noc += 5;
} elseif($t == 252 || $t == 253)
{
$tn = 6; $n += 6; $noc += 6;
}
else
{

$n++;

}
if($noc >= $length) break;
}
if($noc > $length) $n -= $tn;
$strcut = substr($string, 0, $n);

}
else
{
$dotlen = strlen($dot);
$maxi = $length - $dotlen - 1;

for($i = 0; $i < $maxi; $i++)
{
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
}
var_dump($strcut);
return $strcut;
}
echo "jjjkkklll";
echo strcut("向kk向向向kk向向向kk向向kkklllllllllllmmmmmmmmmmmmmmm向东阳",12)

字符截取函数二

function splitstr($str,$len){
if($len<=0){
return false;
}
else{
$slen=strlen($str);
if($len>=$slen)
return $str;
else{
for($i=0;$i<($len-1);$i++){
if(ord(substr($str,$i,1))>0xa0)
$i++;
}
if($i>=$len)
return substr($str,0,$len);
elseif(ord(substr($str,$i,1))>0xa0)
return substr($str,0,$len-1);
else
return substr($str,0,$len);
}
}
}

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