php字符串截取函数,支持中文 utf-8截取

时间：2015-01-23 来源：西部数据作者：西部数据

<!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" />

<title>environment</title>

</head>

<?php

$str = "中12hb千钧一发lap";

echo mb_substr($str,0,5,'utf-8');echo '<br>';

echo mb_substr($str,5,3,'utf-8');echo '<br>';

echo mb_substr($str,8,4,'utf-8');

?>

<body>

</body>

</html>

<?php

function str_wrap1($str,$elen=30)

{

    $tlen = mb_strlen($str,"utf8"); //共有多少字

    //$elen = 8; //每行字符串长度8个字符、4个汉字

    $dlen = 0; //每行显示长度

    $str_wrap = '';

    for($i=0;$i<$tlen;$i++)

    {

        $tmpchar = mb_substr($str,$i,1,"utf8");

        if(strlen($tmpchar) == 3)

            $charlen = 2;

        else

            $charlen = 1;

        if( $dlen < $elen-1 )

        {

            $dlen += $charlen;

            $str_wrap .= $tmpchar;

        }//开源软件:phpfensi.com

        else

        {

            $str_wrap .= "<br>".$tmpchar;

            $dlen = $charlen;

        }

    }

    return $str_wrap;

}

echo str_wrap1($str,5);

?>