Ask for a specific Php+mysql page-no online search

Ask for a specific Php+mysql page-----don't search online.
One, from page a click on page b for pagination display
Second, pagination display of the code
Third, there First prev 1 2 3 4 5 Next lastThe function
Four, after the page can Normal DisplayThe content is to click on the next page to display the database data (the parameters of page A is not lost),

------Solution--------------------

Class page{
Private $_page_num;//Total Pages
Private $_page_size=10;//number of articles per page
Private $_page_url;//url Links
Private $_limit;//limit1
Private $_page_total;//Total Pages
Private $_page;//page value of paging
Private $_list_size=10;//This shows the number of bars for the second paging method
Private $_page_sort=3;//page on both sides of the distance
Public function __construct ($_total,$_pagesize,$_list_size) {
$this->_page_size=$_pagesize;
$this->_page_total=$_total;
$this->_list_size = $_list_size;
$this->_page_num = round ($this->_page_total/$this->_page_size);
$this->_page= $this->getnum ();
$this->_limit= "Limit". $this->_page* $this->_page_size. ",". $this->_page_total=$_total;
$this->_page_url= $this->seturl ();
}
/**
* Get the current page
* Enter description here ...
*/
Private Function Getnum () {
if (Isset ($_get[' page ')) {
if (Is_numeric ($_get[' page ')) {
if ($_get[' page ']>0) {
if (ceil ($_get[' page ') >=1 && ceil ($_get[' page ') <= $this->_page_num) {
return ceil ($_get[' page ');
}elseif (ceil ($_get[' page ') > $this->_page_num) {
return $this->_page_num;
}
}else{
return 1;
}
}else{
return 1;
}
}else{
return 1;
}
}
/**
* Convert Links
* Enter description here ...
*/
Private Function SetUrl () {
$_url=$_server[' Request_uri '];//GET request address
$_par=parse_url ($_url);//Parse URL
if (isset ($_par[' query ')) {//To determine if AA=BB is present in this format
$_URL=PARSE_STR ($_par[' query '],$_query);//Refactor URL
unset ($_query[' page ');
$_url=$_par[' path ']. '? '. Http_build_query ($_query);
}else{
$_url=$_url. '? ';
}
return $_url;
}

Public function limit () {
return $this->_limit;
}

Public Function Pagenum () {
return $this->_page_num;
}

/*
Public Function page () {
return $this->_page;
}
Public Function Pageurl () {
return $this->_page_url;
}
*/

Private Function First () {
Return "_page_url." &page=1> Home ";
}
Private Function End () {
Return "_page_url." &page= ". $this->_page_num." > Last ";
}
Private Function prev () {
if ($this->_page>1) {
Return "_page_url." &page= ". ($this->_page-1). " > Previous page ";
}else{
Return ' previous page ';
}
}
Public function next () {
if ($this->_page< $this->_page_num) {
Return "_page_url." &page= ". ($this->_page+1). " > next Page ";
}else{
Return ' next page ';
}
}
Private Function pagelist_1 () {
$_page= ";
for ($i =1; $i <= $this->_page_num; $i +) {
$_page.= "_page_url." &page= ". $i." > ". $i.";
}
return $_page;
}
Private Function pagelist_2 () {
$_page= ";
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