php代码
<?php /** * @param string $string 需要截取的字符串 * @param string $sublen 需要截取的长度(英文和中文都计算一个) * @param string $tags 需要保留的标签 * @param string $endTag 最后截取位置标签(为保证不出现排版错乱,必须与$tags中第一个标签成对) * @return string */ function _formatString($string,$sublen=100,$tags='',$endTag=''){ $string=stripslashes($string); $string=strip_tags($string,$tags); $string=str_ireplace("\t","",$string); $string=str_ireplace("\r\n","",$string); $string=str_ireplace("\r","",$string); $string=str_ireplace("\n","",$string); $string=str_ireplace(" ","",$string); $length=strlen($string); $tag_len=strlen($endTag); $new_str=mb_substr($string,0,$sublen,'utf-8'); $new_len=strlen($new_str); $end_len=strripos($new_str,$endTag)+$tag_len; //最后一次出现标签位置再加上自身标签长度 if($new_len!=$end_len){ if($end_len==$tag_len){ for($i=$new_len; $i <=$length; $i++){ $str=substr($string,0,$i); if(strpos($str,$endTag)){ $new_str=$str; break; } } }else{ $new_str=substr($new_str,0,$end_len); } } return $new_str; }
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