PHP General Page class page.php[imitation Google pagination]_php instance

page.php

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<?php

/**
* * General PHP Paging class. (Imitation Google style)
* * Just provide a total number of records and two parameters per page display. (Detailed use instructions are attached.)
* * without specifying a URL, the link is generated by the program. Convenient for retrieving results paging.
* * form is submitted with Get method to ensure that URL parameters are not lost when operations such as queries are deleted.
**/

Class pager{
IE Address Bar address
var $url;
Record total number of bars
var $countall;
Total pages
var $page;
Pagination Digital Link
var $thestr;
First page, Previous link
var $backstr;
Last page, Next link
var $nextstr;
Current page number
var $pg;
Show number of records per page
var $countlist;
Flip Style
var $style;
constructor, which executes the function automatically when instantiating the class
function Pager ($countall, $countlist, $style = "page") {
Number of records and display of each page can not be a team, the page after the rest plus 1
$this->countall = $countall;
$this->countlist = $countlist;
$this->style= $style;
if ($this->countall% $this->countlist!=0) {
$this->page=sprintf ("%d", $this->countall/$this->countlist) +1;
}else{
$this->page= $this->countall/$this->countlist;
}

$this->pg=$_get["PG"];
Ensure that PG is not specified to start at page 1th
if (!ereg ("^[1-9][0-9]*$", $this->pg) | | empty ($this-&GT;PG)) {
$this->pg=1;
}
Page number is out of maximum range, maximum value
if ($this->pg> $this->page) {
$this->pg= $this->page;
}
Gets the current URL. See the bottom of the function of the actual implementation of the entity
$this->url = Pager::geturl ();
Replace the wrong formatted page number with the correct page number
if (Isset ($_get["PG")) && $_get["PG"]!= $this-&GT;PG) {
$this->url=str_replace ("pg=". $_get["PG"], "? pg= $this->pg", $this->url);
$this->url=str_replace ("&pg=". $_get["PG"], "&pg= $this->pg", $this->url);
}
Generates pagination in digital form 12345.
if ($this->page<=10) {
For ($i =1 $i < $this->page+1; $i + +) {
$this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this-&GT;PG);
}
}else{
if ($this->pg<=5) {
For ($i =1 $i <10; $i + +) {
$this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this-&GT;PG);
}
}else{
if (6+ $this->pg<= $this->page) {
for ($i = $this->pg-4; $i < $this->pg+6; $i + +) {
$this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this-&GT;PG);
}
}else{
for ($i = $this->pg-4; $i < $this->page+1; $i + +) {
$this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this-&GT;PG);
}

}
}
}
Generate a text link on the next page of the page
$this->backstr = pager::gotoback ($this->pg);
$this->nextstr = Pager::gotonext ($this->pg, $this->page);
Echo ("Total" $this->countall. "Strip, per page". $this->countlist. " , $this->page. " Page ". $this->backstr. $this->thestr. $this->nextstr);
}
Auxiliary functions for generating digital paging
function Makepg ($i, $PG) {
if ($i = = $PG) {
Return "<font class= '". $this->style. "' > ". $i." </font> ";
}else{
Return "<a href=". PAGER::REPLACEPG ($this->url,5, $i). "class=". $this->style. "' ><u> ". $i." </u></a> ";
}
}
A function that generates information such as the previous page
function Gotoback ($PG) {
if ($pg -1>0) {
return $this->gotoback= "<a href=". PAGER::REPLACEPG ($this->url,3,0). "class=". $this->style. "' > Home </a> <a href= ". PAGER::REPLACEPG ($this->url,2,0). "class=". $this->style. "' > Prev </a> ";
}else{
return $this->gotoback= "<span class=". $this->style. "' > Home prev </span> ";
}
}
A function that generates information such as the next page
function GoToNext ($PG, $page) {
if ($pg < $page) {
Return "<a href=". PAGER::REPLACEPG ($this->url,1,0). "class=". $this->style. "' > next page </a> <a href= ". PAGER::REPLACEPG ($this->url,4,0). "class=". $this->style. "' > Last </a> ";
}else{
Return "<span class= '". $this->style. "' > Next Last </span> ";
}
}
Handles the $pg method in the URL for automatic generation of pg=x
function Replacepg ($url, $flag, $i) {
if ($flag = = 1) {
$temp _PG = $this->pg;
Return Str_replace ("pg=". $temp _pg, "pg=". $this->pg+1), $url);
}else if ($flag = = 2) {
$temp _PG = $this->pg;
Return Str_replace ("pg=". $temp _pg, "pg=". $this->pg-1), $url);
}else if ($flag = = 3) {
$temp _PG = $this->pg;
Return Str_replace ("pg=". $temp _pg, "pg=1", $url);
}else if ($flag = = 4) {
$temp _PG = $this->pg;
Return Str_replace ("pg=". $temp _pg, "pg=". $this->page, $url);
}else if ($flag = = 5) {
$temp _PG = $this->pg;
Return Str_replace ("pg=". $temp _pg, "pg=". $i, $url);
}else{
return $url;
}
}
How to get the current URL
function GetUrl () {
$url = "http://" $_server["http_host"];
if (Isset ($_server["Request_uri"])) {
$url. =$_server["Request_uri"];
}else{
$url. =$_server["Php_self"];
if (!empty ($_server["query_string"])) {
$url. = "?". $_server["Query_string"];
}
}
Add pg=x words to the current URL
if (!ereg () (pg=| pg=|pg=| pg=) ", $url)) {
if (!strpos ($url, "?")) {
$url = $url. "? Pg=1 ";
}else{
$url = $url. " &pg=1 ";
}
}
return $url;
}
}
?>