PHP 获取百度相关搜索和原创的程度
PHP
获取百度相关搜索和原创程度
获取原创程度是 get_em_times
,数值越高文本长度越长越不原创。
用于采集项目的搜索引擎优化
class baidu {
public static function build_request_uri($words){
$words = urlencode(Text::convert_encoding($words,'GBK','UTF-8'));
return '/s?wd='.$words;
}
public static function get_relate_search($words){
$content = self::get_content($words);
if(preg_match('/\<div id="rs"\>(((?!\<\/div\>).)*)\<\/div\>/', $content,$result)){
if(preg_match_all('/\<a((?!\>).)*\>(.*?)\<\/a\>/', $result[1], $result)) return
$result[2];
}
return FALSE;
}
/**
* 根据空格分词,获取百度关键词完全匹配<em></em>的次数
* @param string $words
* @return int
*/
public static function get_em_times($words){
$word = explode(' ', $words);
$content = self::get_content($words);
preg_match_all('/\<em\>(((?!\<\/em\>).)*)\<\/em\>/', $content,$result);
if(!isset($result[1]) || count($result[1])==0)
return 0;
$word_table = array_count_values($result[1]);
$times = 0;
foreach ($word as $pice){
if(array_key_exists($pice, $word_table)) $times+=$word_table[$pice];
}
return $times;
}
public static function get_content($words){
static $loaded_contents = array();
if(!isset($loaded_contents[$words])){
$content =
file_get_contents("http://www.baidu.com".self::build_request_uri($words));
$content = Text::convert_encoding($content,'UTF-8','GBK');
$loaded_contents[$words] = $content;
}
return $loaded_contents[$words];
}