Code _php tutorial for a PHP page-out class

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/**
* filename:ext_page.class.php
* @package:p Hpbean
* @author: FEIFENGXLQ
* @copyright: Copyright 2006 FEIFENGXLQ
* @license: Version 2.0
* @create: 2006-5-31
* @modify: 2006-6-1
* @modify: FEIFENGXLQ 2006-11-4
* Description: Paging class, four paging modes
* 2.0 added Features: Support custom style, custom style, support PHP4 and PHP5,
* To see Detail,please visit http://www.phpobject.net/blog/read.php?
* Example:
* Mode four paging modes:
Require_once ('.. /libs/classes/page.class.php ');
$page =new page (Array (' Total ' =>1000, ' perpage ' =>20));
Echo ' Mode:1
'. $page->show ();
Echo ' Mode:2
'. $page->show (2);
Echo ' Mode:3
'. $page->show (3);
Echo ' Mode:4
'. $page->show (4);
Turn on Ajax:
$ajaxpage =new page (Array (' Total ' =>1000, ' perpage ' =>20, ' ajax ' = ' ajax_page ', ' page_name ' = ' test '));
Echo ' Mode:1
'. $ajaxpage->show ();
Adopt the inherited custom paging display mode:
Demo:http://www.phpobject.net/blog
*/
Class page
{
/**
* Config, public
*/
var $page _name= "Pb_page";//page tag, used to control the URL page
var $next _page= ' > ';//Next page
var $pre _page= ' < ';//prev
var $first _page= ' first ';//Home
var $last _page= ' last ';//End
var $pre _bar= ' << ';//previous page bar
var $next _bar= ' >> ';//Next page Bar
var $format _left= ' [';
var $format _right= '];
var $is whether _ajax=false;//supports Ajax paging mode

/**
* Private
*
*/
var $pagebarnum =10;//Control the number of record bars.
var $totalpage total Pages =0;//
var $ajax _action_name= ";//ajax action Name
var $nowindex =1;//Current Page
var $url = "";//url address Header
var $offset = 0;

/**
* Constructor Constructor
*
* @param array $array [' total '], $array [' Perpage '], $array [' Nowindex '], $array [' url '], $array [' Ajax ']
*/
Function page ($array)
{
if (Is_array ($array)) {
if (!array_key_exists (' Total ', $array)) $this->error (__function__, ' need a param of total ');
$total =intval ($array [' total ']);
$perpage = (array_key_exists (' Perpage ', $array))? intval ($array [' Perpage ']): 10;
$nowindex = (array_key_exists (' Nowindex ', $array))? intval ($array [' Nowindex ']): ';
$url = (array_key_exists (' url ', $array))? $array [' url ']: ';
}else{
$total = $array;
$perpage = 10;
$nowindex = ";
$url = ";
}
if ((!is_int ($total)) | | ($total <0)) $this->error (__function__, $total. ' is not a positive integer! ');
if ((!is_int ($perpage)) | | ($perpage <=0)) $this->error (__function__, $perpage. ' is not a positive integer! ');
if (!empty ($array [' page_name '])) $this->set (' page_name ', $array [' page_name ']);//set PAGENAME
$this->_set_nowindex ($nowindex);//Set the current page
$this->_set_url ($url);//Set link address
$this->totalpage=ceil ($total/$perpage);
$this->offset= ($this->nowindex-1) * $perpage;
if (!empty ($array [' Ajax])) $this->open_ajax ($array [' Ajax ']);//Open Ajax mode
}
/**
* Set the value of the variable name specified in the class, if the change does not belong to this class, will throw a exception
*
* @param string $var
* @param string $value
*/
function set ($var, $value)
{
if (In_array ($var, Get_object_vars ($this)))
$this $var = $value;
else {
$this->error (__function__, $var. "Does not belong to pb_page!");
}

}
/**
* Turn on inverted Ajax mode
*
* @param string $action The default Ajax-triggered action.
*/
function Open_ajax ($action)
{
$this->is_ajax=true;
$this->ajax_action_name= $action;
}
/**
* Get the code that shows "next page"
*
* @param string $style
* @return String
*/
function Next_page ($style = ")
{
if ($this->nowindex< $this->totalpage) {
return $this->_get_link ($this->_get_url ($this->nowindex+1), $this->next_page, $style);
}
Return ' '. $this->next_page. '';
}

/**
* Get the code that shows "previous page"
*
* @param string $style
* @return String
*/
function Pre_page ($style = ")
{
if ($this->nowindex>1) {
return $this->_get_link ($this->_get_url ($this->nowindex-1), $this->pre_page, $style);
}
Return ' '. $this->pre_page. '';
}

/**
* Get the code that shows "home page"
*
* @return String
*/
function First_page ($style = ")
{
if ($this->nowindex==1) {
Return ' '. $this->first_page. '';
}
return $this->_get_link ($this->_get_url (1), $this->first_page, $style);
}

/**
* Get the code that shows "last"
*
* @return String
*/
function Last_page ($style = ")
{
if ($this->nowindex== $this->totalpage) {
Return ' '. $this->last_page. '';
}
return $this->_get_link ($this->_get_url ($this->totalpage), $this->last_page, $style);
}

function Nowbar ($style = ", $nowindex _style=")
{
$plus =ceil ($this-&GT;PAGEBARNUM/2);
if ($this->pagebarnum-$plus + $this->nowindex> $this->totalpage) $plus = ($this->pagebarnum-$this totalpage+ $this->nowindex);
$begin = $this->nowindex-$plus +1;
$begin = ($begin >=1)? $begin: 1;
$return = ";
for ($i = $begin; $i < $begin + $this->pagebarnum; $i + +)
{
if ($i <= $this->totalpage) {
if ($i! = $this->nowindex)
$return. = $this->_get_text ($this->_get_link ($this->_get_url ($i), $i, $style));
Else
$return. = $this->_get_text (' '. $i. '');
}else{
Break
}
$return. = "\ n";
}
Unset ($begin);
return $return;
}
/**
* Get the code to show the Jump button
*
* @return String
*/
function Select ()
{
$return = ' '; for ($i =1; $i <= $this->totalpage; $i + +) {if ($i = = $this->nowindex) {$return. = ''. $i. '; }else{$return. = ''. $i. '; }} unset ($i); $return. = '';
return $return;
}

/**
* Get the value required for limit in MySQL statement
*
* @return String
*/
function offset ()
{
return $this->offset;
}

/**
* Control pagination Display style
*
* @param int $mode
* @return String
*/
Function Show ($mode =1)
{
Switch ($mode)
{
Case ' 1 ':
$this->next_page= ' next page ';
$this->pre_page= ' previous page ';
return $this->pre_page (). $this->nowbar (). $this->next_page (). ' Section '. $this->select (). ' Page ';
Break
Case ' 2 ':
$this->next_page= ' next page ';
$this->pre_page= ' previous page ';
$this->first_page= ' home ';
$this->last_page= ' last ';
return $this->first_page (). $this->pre_page (). ' [No. $this->nowindex] '. $this->next_page (). $this->last_page (). ' Section '. $this->select (). ' Page ';
Break
Case ' 3 ':
$this->next_page= ' next page ';
$this->pre_page= ' previous page ';
$this->first_page= ' home ';
$this->last_page= ' last ';
return $this->first_page (). $this->pre_page (). $this->next_page (). $this->last_page ();
Break
Case ' 4 ':
$this->next_page= ' next page ';
$this->pre_page= ' previous page ';
return $this->pre_page (). $this->nowbar (). $this->next_page ();
Break
Case ' 5 ':
return $this->pre_bar (). $this->pre_page (). $this->nowbar (). $this->next_page (). $this->next_bar ();
Break
}

}
/*----------------Private Function (proprietary method)-----------------------------------------------------------*/
/**
* Set URL header address
* @param: String $url
* @return Boolean
*/
function _set_url ($url = "")
{
if (!empty ($url)) {
Manually set
$this->url= $url. (Stristr ($url, '? '))? ' & ': '? '). $this->page_name. " =";
}else{
Automatically get
if (Empty ($_server[' query_string ')) {
When there is no query_string
$this->url=$_server[' Request_uri ']. "?". $this->page_name. " =";
}else{
//
if (Stristr ($_server[' query_string '), $this->page_name. ' =')){
Address exists page parameter
$this->url=str_replace ($this->page_name. ' = '. $this->nowindex, ' ', $_server[' Request_uri ']);
$last = $this->url[strlen ($this->url)-1];
if ($last = = '? ' | | $last = = ' & ') {
$this->url.= $this->page_name. " =";
}else{
$this->url.= ' & $this->page_name. " =";
}
}else{
//
$this->url=$_server[' Request_uri ']. ' & '. $this->page_name. ' =';
}//end if
}//end if
}//end if
}

/**
* Set Current page
*
*/
function _set_nowindex ($nowindex)
{
if (empty ($nowindex)) {
System acquisition

if (Isset ($_get[$this->page_name])) {
$this->nowindex=intval ($_get[$this->page_name]);
}
}else{
Manually set
$this->nowindex=intval ($nowindex);
}
}

/**
* Returns the address value for the specified page
*
* @param int $pageno
* @return String $url
*/
function _get_url ($pageno =1)
{
Return $this->url. $pageno;
}

/**
* Get pagination display text, e.g. _get_text (' 1 ') will return by default [1]
*
* @param String $str
* @return String $url
*/
function _get_text ($STR)
{
Return $this->format_left. $str. $this->format_right;
}

/**
* Get link address
*/
function _get_link ($url, $text, $style = ") {
$style = (Empty ($style))? ": ' class=" '. $style. ' ";
if ($this->is_ajax) {
If you are using AJAX mode
Return ' Ajax_action_name. ' (\ '. $url. ') \ ') ' > ' $text. ';
}else{
Return '. $text. ';
}
}
/**
* Error Handling method
*/
Function error ($function, $errormsg)
{
Die (' Error in file ' '. __file__. ', Function '. $function. ' (): '. $errormsg);
}
}
$page =new page (Array (' Total ' =>1000, ' perpage ' =>20));
Echo ' Mode:1
'. $page->show ();
Echo ' Mode:2
'. $page->show (2);
Echo ' Mode:3
'. $page->show (3);
Echo ' Mode:4
'. $page->show (4);
Echo ' Start Ajax mode: ';
$ajaxpage =new page (Array (' Total ' =>1000, ' perpage ' =>20, ' ajax ' = ' ajax_page ', ' page_name ' = ' test '));
Echo ' Mode:1
'. $ajaxpage->show ();
?>

In fact, my current job is to do telephone recording card such hardware phone recording system software, for some code is still very sensitive, not just learning PHP, learning any programming language need to read more, write more, think!

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