How does the paging function in this package change to this effect?

Don't let it show all pages will always show only 5 pages or 10 pages just like in the picture. How should I change this code?

function Fenye () {
Global $page, $pagenum;
echo "";
echo "

";
Echo '
• '. $page. ' /'. $pagenum. ' Page |
';
if ($page ==1) {
Echo '
• Home |
';
Echo '
• Prev |
';
}else{
Echo '
• Home |
';
Echo '
• Prev |
';
}
Echo ';
Echo '
;
for ($i =0; $i < $pagenum; $i + +) {
Echo '
• '. ($i + 1). '
';
}
Echo '
;
Echo ';
if ($page = = $pagenum) {
Echo '
• | The next page |
';
Echo '
• End |
';
}else{
Echo '
• | The next page |
';
Echo '
• End |
';
}
Echo '

';
Echo ';

};
?>

Reply to discussion (solution)

This is the database query page
!--? php
include ' fenye.php ';
Header (' content-type:text/html;charset=utf-8; ');
$pdo =new PDO ("Mysql:host=localhost;dbname=t1", "Root", "");
$stmt = $pdo->prepare ("SELECT * from Jianzhi");
$stmt->execute ();
$res = $stmt->fetchall ();
$rows =count ($res);//total number of bars
$pagesize =8;//per page
if ($rows ==0) {
$pagenum = 0;
}else{
$pagenum =ceil ($rows/$pagesize),//Divided into pages
}
if (isset ($_get[' page ')) {
$page =$_get[' page ']; br> if (Empty ($page) | | $page <0| |! Is_numeric ($page)) {
$page = 1;
}else{
$page =intval ($page);
}
}else{
$page = 1;
}
if ($page > $pagenum) {
$page = $pagenum;
}
$startnum = ($page-1) * $pagesize;
$query = "SELECT * FROM Blog LIMIT $startnum, $pagesize";
$stmt 2= $pdo->prepare ($query);
$stmt 2->execute ();
$res 2= $stmt 2->fetchall (PDO::FETCH_ASSOC);

Look at this, and you'll understand. http://www.imooc.com/learn/419

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