Use PHP + MYSQL to implement hierarchical + paging display in the forum_PHP tutorial

/*Table structure for storing posts--------------------------------------------- ------------------
create table bbsrow(
bbsrow_id int(6) not null auto_increment, //Post ID number
bbsrow_auth varchar(20 ) not null, //Post author
bbsrow_parentid int(6), //The post's father's post ID number, if it is the first post, it will be empty
bbsrow_title varchar(200) not null, //Post Subtitle
bbsrow_returncount int(3), //The number of replies to the post, if there is no reply, it will be empty
primary key (bbsrow_id)
);
------ -------------------------------------------------- --------------------*/
//Show the recursive function posted by my son----------------- ----------------------------------
function showchildren($parent_id){
global $connect_id;
$query="select * from bbsrow where bbsrow_parentid='" . $parent_id . "'";
$result_top=mysql_query($query,$connect_id);
echo "

";
while($myrow_child=mysql_fetch_row($result_top)){
echo "
• ";
  echo $myrow_child[0];
  echo $myrow_child[1];
  echo $myrow_child[2];
  echo $myrow_child[3];
  echo $myrow_child[4] . " ";
  //If the number of reply posts is not empty, it means there are son posts and continue to display son posts
  if($myrow_child[4]!=''){
  showchildren($myrow_child[0 ]);
  }
  }
  echo "

";
}
//------------------ -------------------------------------------------- --
//Connect to the database and put all first posts into the $mainrow array----------------------------
$connect_id=mysql_connect("localhost","test","test") or die("Unable to connect to database");
mysql_select_db("bbs") or die("Unable to select database");
$query="select * from bbsrow where bbsrow_parentid=''";
$result=mysql_query($query,$connect_id);
$i=0;
while($myrow=mysql_fetch_row($ result)) {
$mainrow[$i][0]=$myrow[0];
$mainrow[$i][1]=$myrow[1];
$mainrow[$i ][2]=$myrow[2];
$mainrow[$i][3]=$myrow[3];
$mainrow[$i][4]=$myrow[4];

http://www.bkjia.com/PHPjc/631062.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/631062.htmlTechArticle? /*Table structure for storing posts--------------- --------------------------------------- create table bbsrow( bbsrow_id int(6) not null auto_increment, //Post ID number bbsrow_auth varchar(2...