这篇文章主要介绍了php获取百度收录、百度热词及百度快照的方法,实例分析了php抓取百度页面及对应字符串分析的技巧,非常具有实用价值,需要的朋友可以参考下
本文实例讲述了php获取百度收录、百度热词及百度快照的方法。分享给大家供大家参考。具体如下:
获取百度收录:
<?php /* 抓取百度收录代码 */ function baidu($s){ $baidu="http://www.baidu.com/s?wd=site%3A".$s; $site=file_get_contents($baidu); //$site=iconv("gb2312", "UTF-8", $site); ereg("找到相关网页(.*)篇,", $site,$count); $count=str_replace("找到相关网页","",$count); $count=str_replace("篇,","",$count); $count=str_replace("约","",$count); $count=str_replace(",","",$count); return $count[0]; } echo baidu(www.jb51.net); //获取脚本之家在百度中的收录数量 ?>
获取百度的热词
<?php /** * @return array 返回百度的热词数据(数组返回) */ function getBaiduHotKeyWord() { $templateRss = file_get_contents('http://top.baidu.com/rss_xml.php?p=top10'); if (preg_match('/<table>(.*)<\/table>/is', $templateRss, $_description)) { $templateRss = $_description [0]; $templateRss = str_replace("&", "&", $templateRss); } $templateRss = "<?xml version=1.0 encoding=GBK?>" . $templateRss; $xml = @simplexml_load_String($templateRss); foreach ($xml->tbody->tr as $temp) { if (!empty ($temp->td->a)) { $keyArray [] = trim(($temp->td->a)); } } return $keyArray; } print_r(getBaiduHotKeyWord());
这是在网上找的 稍微修改了下 将下面代码写入php文件
百度收录和百度快照时间
<?php $domain = "//www.jb51.net/"; *欲查询的域名*/ $site_url = 'http://www.baidu.com/s?wd=site%3A'; $all = $site_url.$domain; /*域名所有收录的网址*/ $today = $all.'&lm=1'; /*域名今日收录的网址*/ $utf_pattern = "/找到相关结果数(.*)个/"; $kz_pattern = "/<span class="g">(.*)</span>/"; /*用以匹配快照日期的字符串*/ $times = "/d{4}-d{1,2}-d{1,2}/"; /*匹配快照日期的正则表达式,如:2011-8-4*/ $s0 = @file_get_contents($all); /*将site:www.jb51.net的网页置入$s0字符串中*/ $s1 = @file_get_contents($today); preg_match($utf_pattern,$s0,$all_num); /*匹配"找到相关结果数*个"*/ preg_match($utf_pattern,$s1,$today_num); preg_match($kz_pattern,$s0,$temp); preg_match($times,$temp[0],$screenshot); if($all_num[1] == "") $all_num[1] = 0; if($today_num[1] == "") $today_num[1] = 0; if($screenshot[0] == "") $screenshot[0] = "暂无快照"; ?> <html> <head> <title>Test</title> </head> <body> <table> <tr> <td>日期</td><td>百度收录</td><td>百度今日收录</td><td>百度快照日期</td> </tr> <tr> <td><?php echo date('m月d日G时');?> </td><td> <?php echo $all_num[1]; ?></td><td> <?php echo $today_num[1]; ?></td><td> <?php echo $screenshot[0]; ?></td> </tr> </table> <p>百度收录:<a href="<?php echo $all; ?>" target="_blank"> <?php echo $all_num[1]; ?></a></p> <p>百度今日收录:<a href="<?php echo $today; ?>" target="_blank"> <?php echo $today_num[1]; ?></a></p> <p>百度快照日期:<a href="<?php echo $all; ?>"> <?php echo $screenshot[0]; ?></a></p> </body> </html>

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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