php中英文字符串长度截取的例子

<?php
mb_internal_encoding(&#39;UTF-8&#39;);
$str = "中文测试chineseTest";
header(&#39;content-type:text/html; charset=UTF-8&#39;);
echo mb_strlen($str);
echo &#39;<br/>&#39;;
echo mb_substr($str, 1, 6);
?>

<?php
/*mb_string方法截取字符串长度
 * $arr_str 数组或字符串
 * $tlen 截取长度
 * $fleid 要截取的字段（数组形式）
*/
header(&#39;Content-Type: text/html; charset=utf-8&#39;);
function interception($arr_str, $tlen, $fleid = &#39;&#39;) {
    //判断是否是数组
    if (is_array($arr_str)) {
        //将数组下标重新排列
        foreach ($arr_str as $key => $val) {
            for ($k = 0; $k < count($fleid); $k++) {
                $content = $arr_str[$fleid[$k]];
                //判断是否大于指定的长度
                if (mb_strlen($content, &#39;utf-8&#39;) > $tlen) {
                    $arr_str[$fleid[$k]] = mb_substr($content, 0, $tlen, &#39;utf-8&#39;) . &#39;...&#39;;
                }
            }
        }
    }
    //判断是否是字符串
    elseif (is_string($arr_str)) {
        if (mb_strlen($arr_str, &#39;utf-8&#39;) > $tlen) {
            $arr_str = mb_substr($arr_str, 0, $tlen, &#39;utf-8&#39;) . &#39;...&#39;;
        }
    }
    return $arr_str;
}
//使用示例
//数组示例
$array = array(
    &#39;ha&#39; => &#39;哈尔滨市&#39;,
    &#39;bei&#39; => &#39;地球中国北京市&#39;,
);
//字符串示例
$string = &#39;中国的互联网：商业化很牛，公共服务几乎没有谢文&#39;;
$string2 = &#39;abcdefghijkl&#39;;
print_r(interception($array, 2, array(
    &#39;ha&#39;,
    &#39;bei&#39;
)));
echo &#39;<br />&#39; . interception($string, 5);
echo &#39;<br />&#39; . interception($string2, 5);
?>