抓取“IC 交易网”供应商程序_PHP教程

/**
* 抓取“IC 交易网”供应商主程序
* author Lee.
* Last modify $Date: 2012-2-6 10:44:32$
* 注：本程序按照编码 GB2312 执行，因为“IC 交易网”网站是GB2312编码，数据库也得保持一致
*/
class ic {
private $key; // 型号
private $pageNum; // 页码

/**
* 入口程序
*/
public function go($key) {
$this->key = $key;
$this->pageNum = $this->getPageNum();
$this->getInfo();
}

/**
* 获取供应商 url 链接数组
* @return ArrayObject
*/
private function getInfo() {
if ($this->pageNum==1) { # 处理只有一页的情况
$arr = $this->shopUrlMatchReArr($this->getContent());
$this->isAddSuccess($arr);
} elseif ($this->pageNum>1) { # 多页
for ($i=1; $ipageNum; $i++) {
$arr = $this->shopUrlMatchReArr($this->getContent($i));
$this->isAddSuccess($arr);
}
}
}

/**
* 打印是否添加成功
* @param ArrayObject $arr
* @return string
*/
private function isAddSuccess($arr) {
foreach ($arr as $k=>$v) {
if ($this->execAdd($this->getInfoByShopUrl($v))) {
echo 'Add Success!!';
} else {
echo 'Add Faild!!';
}
}
}

/**
* 执行添加到数据库
* @param ArrayObject $infoArr
* @return Number 受影响的行数
*/
private function execAdd($infoArr) {
$mysqli = $this->getDb();
if (!emptyempty($infoArr['company'])) {
if (!$this->isExists($mysqli, $infoArr)) {
$num = $mysqli->query("INSERT INTO ic(company,address,phone,mobile,fax,zip,person,qq,msn,email,website,regDate,shopUrl) VALUES ('{$infoArr['company']}','{$infoArr['address']}','{$infoArr['phone']}','{$infoArr['mobile']}','{$infoArr['fax']}','{$infoArr['zip']}','{$infoArr['person']}','{$infoArr['qq']}','{$infoArr['msn']}','{$infoArr['email']}','{$infoArr['website']}','{$infoArr['regDate']}','{$infoArr['shopUrl']}')");
return $num;
} else {
return false; # 表示数据已经存在
}
} else {
return false;
}
}

/**
* 连接数据库
*/
private function getDb() {
$mysqli = new mysqli('localhost', 'root', '1715544', 'weiku');
$mysqli->query('SET NAMES GB2312');
return $mysqli;
}

/**
* 检查公司是否已经存在
* @param Resource $mysqli
* @param ArrayObject $infoArr
* @return bool
*/
private function isExists($mysqli, $infoArr) {
$mysqli->query("SELECT company FROM ic WHERE company = '{$infoArr['company']}'");
if ($mysqli->affected_rows) {
return true;
} else {
return false;
}
}

/**
* 格式化字符串
* @param string $str
* @return string
*/
private function formatString($str) {
return trim($str);
}

/**
* 抓取信息
* @param $url
* @return ArrayObject
*/
private function getInfoByShopUrl($url) {
$re = $this->getUrlInfo($url);
if (stristr($re, '')) $re = preg_replace('/.*/Usi', '', $re);
preg_match_all('/

/**
* 根据页面获取供应商 url 数组
* @param string $re
* @return ArrayObject
*/
private function shopUrlMatchReArr($re) {
preg_match_all('/.+/Usi', $re, $arr);
$arr = $this->formatUrlArr(array_unique($arr[1]));
return $arr;
}

/**
* 格式化数组
* @param Array $arr
* @return ArrayObject
*/
private function formatUrlArr($arr) {
$newArr = array();
foreach ($arr as $key=>$value) {
if ($this->isExistsHttp($value)) {
$newArr[$key] = $value;
}
}
return $newArr;
}

/**
* 格式化 QQ
* @param string $str
* @return string
*/
private function formatQqMsn($str, $e='QQ') {
if (empty($str)) return '';
preg_match_all('/alt="'.$e.'\:(.+)"/Usi', $str, $arr);
if (count($arr[1])==1) return $arr[1][0];
$newStr = null;
foreach ($arr[1] as $value) {
$newStr .= $value . ' ';
}
return rtrim($newStr, ' ');
}

/**
* 去掉网址的 A 标签
* @param string $site
* @return string
*/
private function stripATags($site) {
$site = preg_replace('/(.+)/', '\1', $site);
return $site;
}

/**
* 检查 url 是否有 http
* @param string $url
* @return bool
*/
private function isExistsHttp($url) {
if (stristr($url, 'http://')) {
return true;
} else {
return false;
}
}

/**
* 获取页面内容
* @param Number $page
* @return string
*/
private function getContent($page=1) {
$re = file_get_contents($this->getUrl($this->key, $page));
return $re;
}

/**
* 获取页码
* @return Number
*/
private function getPageNum() {
$i = null;
$re = $this->getContent();
preg_match_all('/共(.+)页/Usi', $re, $arr);
$i = $arr[1][0];
return $i;
}

/**
* 获取 URL 链接
* @param string $str
* @param int $page 页码
* @return string
*/
private function getUrl($str, $page=1) {
return "http://www.ic.net.cn/partsearch/searchinstock.asp?newtype=1&area=&Page={$page}&partnumber={$str}&mfg=&DateCode=&QTY=&PRICE=&Exact=&orderby=inputdate&qty_filter=50&usertype2=1&pack=";
}

/**
* 获取页面内容
* @param string $url
* @return string
*/
private function getUrlInfo($url) {
$re = file_get_contents($url);
return $re;
}
}

/*
程序运行思路：根据“IC 交易网”的IC搜索功能，输入型号进行搜索，然后抓取供应商信息

数据库结构
CREATE TABLE `ic` (
`id` mediumint(8) unsigned NOT NULL auto_increment,
`company` varchar(500) NOT NULL,
`address` varchar(500) default NULL,
`phone` varchar(500) default NULL,
`mobile` varchar(500) default NULL,
`fax` varchar(300) default NULL,
`zip` varchar(300) default NULL,
`person` varchar(500) default NULL,
`qq` varchar(300) default NULL,
`msn` varchar(300) default NULL,
`email` varchar(500) default NULL,
`website` varchar(300) default NULL,
`regDate` varchar(500) default NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312
*/

$i = new ic();
$arr = array_unique(array('MAX3232', 'AML8613', 'MT6225A', 'OM8373PS/N3/A', 'PT7313', 'MAX8212ESA', 'TL431', 'S3C2440', 'TMS320F2812PGFA', 'PCM1704', 'AN6717', 'CA3162E', 'CA3161E', 'LM393N', 'DS18B20', 'SHT10', 'AML8613', 'AN6717', 'LM393N', 'CA3161E', 'CA3162E', 'PCM1704', 'STK392-040', 'K1667', 'MAX232', 'STM32F103', 'LM358'));
foreach ($arr as $v) {
$i->go($v);
}
?>

摘自 Lee.的专栏

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