thinkphp tp5 常用 functions

/**
 * 过滤转换入脚本
 * @param  $data
 * @param  $no_replace_key 不需要过滤转换的数据键
 * @param string $request_type  请求类型 get post
 */
function search_content_filter($data = array(), $request_type = 'get', $no_replace_key = array())
{
    switch (strtolower($request_type)) {
        case 'get':
            foreach ($data as $key=>$val) {
                if(in_array($key, $no_replace_key)) {
                    continue;
                }
                $_GET[$key] = trim(htmlspecialchars($val,ENT_QUOTES));
            }
            break;
        case 'post':
            foreach ($data as $key=>$val) {
                if(in_array($key, $no_replace_key)) {
                    continue;
                }
                $_POST[$key] = trim(htmlspecialchars($val,ENT_QUOTES));
            }
            break;
    }

}

//Utf 8 字符中文截取方法

//截取utf8字符串
function utf8Substr($str, $from, $len)
{
    return preg_replace('#^(?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,'.$from.'}'.
        '((?:[x00-x7F]|[xC0-xFF][x80-xBF]+){0,'.$len.'}).*#s',
        '$1',$str);
}