兩款php 截取字符串函數
來源：程序員人生 發布時間：2014-02-19 15:56:59 閱讀次數：3915次
提供兩款php 截取字符串函數，他們能自動識別中文哦，如果你是截取文章這個很不錯啊，喜歡就進來看看吧。
第一款：
- <?php
- 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 $strcut;
- }
- echo "jjjkkklll";
- echo strcut("向kk向向向kk向向向kk向向kkklllllllllllmmmmmmmmmmmmmmm向東陽",12)
第二款：
- function splitstr($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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