Home Backend Development PHP Tutorial 解析php根据ip查询所在地区(非常有用,赶集网就用到)_PHP

解析php根据ip查询所在地区(非常有用,赶集网就用到)_PHP

Jun 01, 2016 pm 12:05 PM
ip php area

dat文件,关于ip对应地区的信息文件
qqwry.dat文件
网上自己下载

class类文件,解析qqwry.data文件的
IpLocation.php文件
复制代码 代码如下:
class IpLocation {
    /**
    * @var resource 指针
    */
    private $fp;
    /**
    * 第一条IP记录的偏移地址
    * @var int
    */
    private $firstip;
    /**
    * 最后一条IP记录的偏移地址
    * @var int
    */
    private $lastip;
    /**
    * IP记录的总条数(不包含版本信息记录)
    * @var int
    */
    private $totalip;
    /**
    * 构造函数,打开 QQWry.Dat 文件并初始化类中的信息
    * @param string $filename
    * @return IpLocation
    */
    public function __construct($filename = "qqwry.dat") {
        $this->fp = 0;
        if (($this->fp = @fopen($filename, 'rb')) !== false) {
            $this->firstip = $this->getlong();
            $this->lastip = $this->getlong();
            $this->totalip = ($this->lastip - $this->firstip) / 7;
        }
    }
    /**
    * 返回读取的长整型数
    * @access private
    * @return int
    */
    public function getlong() {
        //将读取的little-endian编码的4个字节转化为长整型数
        $result = unpack('Vlong', fread($this->fp, 4));
        return $result['long'];
    }
    /**
    * 返回读取的3个字节的长整型数
    *
    * @access private
    * @return int
    */
    public function getlong3() {
        //将读取的little-endian编码的3个字节转化为长整型数
        $result = unpack('Vlong', fread($this->fp, 3).chr(0));
        return $result['long'];
    }
    /**
    * 返回压缩后可进行比较的IP地址
    *
    * @access private
    * @param string $ip
    * @return string
    */
    public function packip($ip) {
        // 将IP地址转化为长整型数,如果在PHP5中,IP地址错误,则返回False,
        // 这时intval将Flase转化为整数-1,之后压缩成big-endian编码的字符串
        return pack('N', intval(ip2long($ip)));
    }
    /**
    * 返回读取的字符串
    *
    * @access private
    * @param string $data
    * @return string
    */
    public function getstring($data = "") {
        $char = fread($this->fp, 1);
        while (ord($char) > 0) { // 字符串按照C格式保存,以\0结束
            $data .= $char; // 将读取的字符连接到给定字符串之后
            $char = fread($this->fp, 1);
        }
        return mb_convert_encoding($data, 'utf-8', 'gb2312');
    }
    /**
    * 返回地区信息
    *
    * @access private
    * @return string
    */
    public function getarea() {
        $byte = fread($this->fp, 1); // 标志字节
        switch (ord($byte)) {
            case 0: // 没有区域信息
                $area = "";
            break;
            case 1:
            case 2: // 标志字节为1或2,表示区域信息被重定向
                fseek($this->fp, $this->getlong3());
                $area = $this->getstring();
            break;
            default: // 否则,表示区域信息没有被重定向
                $area = $this->getstring($byte);
            break;
        }
        return $area;
    }
    /**
    * 根据所给 IP 地址或域名返回所在地区信息
    * @access public
    * @param string $ip
    * @return array
    */
    function getlocation($ip) {
        if (!$this->fp) return null; // 如果数据文件没有被正确打开,则直接返回空
        $location['ip'] = gethostbyname($ip); // 将输入的域名转化为IP地址
        $ip = $this->packip($location['ip']); // 将输入的IP地址转化为可比较的IP地址
        // 不合法的IP地址会被转化为255.255.255.255
        // 对分搜索
        $l = 0; // 搜索的下边界
        $u = $this->totalip; // 搜索的上边界
        $findip = $this->lastip; // 如果没有找到就返回最后一条IP记录(QQWry.Dat的版本信息)
        while ($l             $i = floor(($l + $u) / 2); // 计算近似中间记录
            fseek($this->fp, $this->firstip + $i * 7);
            $beginip = strrev(fread($this->fp, 4)); // 获取中间记录的开始IP地址
            // strrev函数在这里的作用是将little-endian的压缩IP地址转化为big-endian的格式
            // 以便用于比较,后面相同。
            if ($ip                 $u = $i - 1; // 将搜索的上边界修改为中间记录减一
            }else{
                fseek($this->fp, $this->getlong3());
                $endip = strrev(fread($this->fp, 4)); // 获取中间记录的结束IP地址
                if ($ip > $endip) { // 用户的IP大于中间记录的结束IP地址时
                    $l = $i + 1; // 将搜索的下边界修改为中间记录加一
                }else{ // 用户的IP在中间记录的IP范围内时
                    $findip = $this->firstip + $i * 7;
                    break; // 则表示找到结果,退出循环
                }
            }
        }
        //获取查找到的IP地理位置信息
        fseek($this->fp, $findip);
        $location['beginip'] = long2ip($this->getlong()); // 用户IP所在范围的开始地址
        $offset = $this->getlong3();
        fseek($this->fp, $offset);
        $location['endip'] = long2ip($this->getlong()); // 用户IP所在范围的结束地址
        $byte = fread($this->fp, 1); // 标志字节
        switch (ord($byte)) {
            case 1: // 标志字节为1,表示国家和区域信息都被同时重定向
                $countryOffset = $this->getlong3(); // 重定向地址
                fseek($this->fp, $countryOffset);
                $byte = fread($this->fp, 1); // 标志字节
                switch (ord($byte)) {
                    case 2: // 标志字节为2,表示国家信息又被重定向
                        fseek($this->fp, $this->getlong3());
                        $location['country'] = $this->getstring();
                        fseek($this->fp, $countryOffset + 4);
                        $location['area'] = $this->getarea();
                        break;
                    default: // 否则,表示国家信息没有被重定向
                        $location['country'] = $this->getstring($byte);
                        $location['area'] = $this->getarea();
                        break;
                }
                break;
            case 2: // 标志字节为2,表示国家信息被重定向
                fseek($this->fp, $this->getlong3());
                $location['country'] = $this->getstring();
                fseek($this->fp, $offset + 8);
                $location['area'] = $this->getarea();
                break;
            default: // 否则,表示国家信息没有被重定向
                $location['country'] = $this->getstring($byte);
                $location['area'] = $this->getarea();
                break;
        }
        if ($location['country'] == " CZ88.NET") { // CZ88.NET表示没有有效信息
            $location['country'] = "未知";
        }
        if ($location['area'] == " CZ88.NET") {
            $location['area'] = "";
        }
        return $location;
    }

    /**
    * 析构函数,用于在页面执行结束后自动关闭打开的文件。
    *
    */
    function __desctruct() {
        if ($this->fp) {
            fclose($this->fp);
        }
        $this->fp = 0;
    }
}
?>

这个也可以网上下载,也可以copy这里的,这里的也是很全的。
执行文件,我这里叫ip_location.php文件
复制代码 代码如下:
function getIpPlace(){
 require_once("IpLocation.php")//加载类文件IpLocation.php
 $ipfile = "qqwry.dat";  //获取ip对应地区的信息文件
 $iplocation = new IpLocation($ipfile); //new IpLocation($ipfile) $ipfile ip对应地区信息文件
 $ipresult = $iplocation->getlocation("ip地址"); //根据ip地址获得地区 getlocation("ip地区")
 return $ipresult;
}
print_r($getIpPlace()); //调用方法
?>

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1657
14
PHP Tutorial
1257
29
C# Tutorial
1230
24
How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

Explain late static binding in PHP (static::). Explain late static binding in PHP (static::). Apr 03, 2025 am 12:04 AM

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases? Apr 03, 2025 am 12:03 AM

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP in Action: Real-World Examples and Applications PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

See all articles