php字符串截取函数（支持中文 utf-8截取）

php教程字符串截取函数（支持中文 utf-8截取）
本文章提供的这二款汉字截取函数方法主要是针对utf8编码如何正确截取汉字的这个问题来做的，

<!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>

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;
        }
        else
        {
            $str_wrap .= "<br>".$tmpchar;
            $dlen = $charlen;
        }
    }
    return $str_wrap;
}

echo str_wrap1($str,5);

补充：Php教程,Php函数