例1
代码如下 | 复制代码 |
function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true) { if(function_exists("mb_substr")) return mb_substr($str, $start, $length, $charset); elseif(function_exists('iconv_substr')) { return iconv_substr($str,$start,$length,$charset); } $re['utf-8'] = "/[x01-x7f]|[xc2-xdf][x80-xbf]|[xe0-xef][x80-xbf]{2}|[xf0-xff][x80-xbf]{3}/"; $re['gb2312'] = "/[x01-x7f]|[xb0-xf7][xa0-xfe]/"; $re['gbk'] = "/[x01-x7f]|[x81-xfe][x40-xfe]/"; $re['big5'] = "/[x01-x7f]|[x81-xfe]([x40-x7e]|xa1-xfe])/"; preg_match_all($re[$charset], $str, $match); $slice = join("",array_slice($match[0], $start, $length)); if($suffix) return $slice."…"; return $slice; } |
例2
代码如下 | 复制代码 |
<?php //$start:指定开始截取字符串的位置;$length指定截取字符的长度 function substr2($string, $start, $length) { $len = strlen($string); if($len > $length) { $str = ''; $len1 = $start + $length; //截取到原字符串的位置 for($i=$start; $i<$len1; $i++) { if(ord(substr($string, $i, 2)) > 0xa0) //在ASCII中,0xa0表示汉字的开始 { $str.=substr($string, $i, 2); $i++; } else { $str.=substr($string, $i, 1); } } return $str.'...'; } else { return $string; } } ?> |
再补充个简单的,思路相同(2010-5-31)
代码如下 | 复制代码 |
<?php function chinesesubstr($str, $start, $len){ $strlen = $start + $len; for($i=0; $i<$strlen; $i++){ if(ord(substr($str, $i, 1)) > 0xa0){ $tmpstr .= substr($str, $i, 2); $i++; }else{ $tmpstr .= substr($str, $i, 1); } } return $tmpstr; } $str = "waiting for you 等wait你back"; echo chinesesubstr($str, 0, 19) ?> |
时间: 2024-10-26 16:27:33