Thousands of miles-Visitor statistics

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Recently, I found a good website with thousands of miles of code. many well-known companies, CODER, reproduce the technical points that are frequently used in actual work or meaningful problems in the form of questions, if you are interested, you can go and see the following link: http://www.qlcoder.com/home

Every website collects visitor data, such as UV, based on visitor logs. UV can answer a key marketing question: "How many people (potential customers) have seen your published information (website ).
According to the access log of a shopping website given in the question below, the UV of the website on the current day is counted. Each line of the log file represents an access behavior. each line contains three items, namely the user access time, user id, and user behavior. May I ask how many users have accessed the website on May 25, August 24.

I just wrote a PHP file with it. it's relatively simple.

  cc();classcountt{functioncc()    {$arr=array();        $count=0;        $f=file("uv.txt");        foreach($fas$k=>$v)        {            $a=explode(" ",$v);            $arr[]=$a[1];        }        sort($arr);        //print_r(array_unique($arr));echo count(array_unique($arr));    }}?>

'). AddClass ('pre-numbering '). hide (); $ (this ). addClass ('Has-numbering '). parent (). append ($ numbering); for (I = 1; I <= lines; I ++) {$ numbering. append ($ ('

'). Text (I) ;}; $ numbering. fadeIn (1700) ;}) ;}; script

The above introduces the thousands of code-visitor statistics, including the content, hope to be helpful to friends interested in PHP tutorials.