thinkphp前台模版字符串截取

转载自:http://blog.21514.com/archives/269
ThinkPHP\Common\extend.php 中管理前台模版的截取{$vons.title|msubstr=0,26}
原始的代码是无法使用截取支持…. 由于涉及到只有汉字检测最为准确
需要加入代码让他正常的分页截取之后加入…

function msubstr($str, $start=0, $length, $charset="utf-8", $suffix=true)
{
	if(strlen($str)/3>$length)
	{
		if(function_exists("mb_substr"))	
		{
			return mb_substr($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;
		}
		else
		{
			return $slice;
		}
	}
	return $str;
}

中英文字符串截取,不乱码

从网上找的一段字符串截取代码,我简单测试了一下,应该是不会乱码的。
如果是中英混合那么,它会把中英文都算作一个字。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<?php
/* 
Utf-8、gb2312都支持的汉字截取函数 
cut_str(字符串, 截取长度, 开始长度, 编码); 
编码默认为 utf-8 
开始长度默认为 0 
*/ 
 
function cut_str($string, $sublen, $start = 0, $code = 'UTF-8') 
{ 
    if($code == 'UTF-8') 
    { 
        $pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/"; 
        preg_match_all($pa, $string, $t_string); 
 
        if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen))."..."; 
        return join('', array_slice($t_string[0], $start, $sublen)); 
    } 
    else 
    { 
        $start = $start*2; 
        $sublen = $sublen*2; 
        $strlen = strlen($string); 
        $tmpstr = ''; 
 
        for($i=0; $i< $strlen; $i++) 
        { 
            if($i>=$start && $i< ($start+$sublen)) 
            { 
                if(ord(substr($string, $i, 1))>129) 
                { 
                    $tmpstr.= substr($string, $i, 2); 
                } 
                else 
                { 
                    $tmpstr.= substr($string, $i, 1); 
                } 
            } 
            if(ord(substr($string, $i, 1))>129) $i++; 
        } 
        if(strlen($tmpstr)< $strlen ) $tmpstr.= "..."; 
        return $tmpstr; 
    } 
} 
 
$str = "abcd需要截取的字符串"; 
echo cut_str($str, 6); 
/** 
 * @package     BugFree 
 * @version     $Id: FunctionsMain.inc.php,v 1.32 2005/09/24 11:38:37 wwccss Exp $ 
 * 
 * 
 * Return part of a string(Enhance the function substr()) 
 * 
 * @author                  Chunsheng Wang <wwccss@263.net> 
 * @param string  $String  the string to cut. 
 * @param int     $Length  the length of returned string. 
 * @param booble  $Append  whether append "...": false|true 
 * @return string           the cutted string. 
 */ 
function sysSubStr($String,$Length,$Append = false) 
{ 
    if (strlen($String) <= $Length ) 
    { 
        return $String; 
    } 
    else 
    { 
        $I = 0; 
        while ($I < $Length) 
        { 
            $StringTMP = substr($String,$I,1); 
            if ( ord($StringTMP) >=224 ) 
            { 
                $StringTMP = substr($String,$I,3); 
                $I = $I + 3; 
            } 
            elseif( ord($StringTMP) >=192 ) 
            { 
                $StringTMP = substr($String,$I,2); 
                $I = $I + 2; 
            } 
            else 
            { 
                $I = $I + 1; 
            } 
            $StringLast[] = $StringTMP; 
        } 
        $StringLast = implode("",$StringLast); 
        if($Append) 
        { 
            $StringLast .= "..."; 
        } 
        return $StringLast; 
    } 
} 
 
$String = "Code简单、精彩、通用"; 
$Length = "6"; 
$Append = false; 
echo sysSubStr($String,$Length,$Append); 
?>