PHP retrieves Baidu-related searches and originality

PHP retrieves Baidu-related searches and originality
The Obtained Degree of originality is get_em_times. The higher the value, the longer the text length.
Search engine optimization for collection items

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;

}

/**

* The number of times that Baidu keywords fully match <em> </em> are obtained based on space word segmentation.

* @ 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];

}

Function check_policy ($ content ){

If (strpos ($ content, "http://verify.baidu.com /")! = FALSE ){

// Baidu requires verification, exception

}

}

}