PHP function implementation pagination with text paging and digital paging _php skills

Most recently, you want to use pagination in your project. Paging is a feature that is often used, so it is encapsulated in functional form.

Paging/** * $pageType Paging Type 1 is a digital paging 2 is a text paging * can pass $pagetotal, $page, $total and other data as parameters, or in paging as a global variable (recommended)/function paging ($ PageType) {Global $pageTotal, $page, $total; if ($pageType = = 1) {echo ' <div id= ' pagenum ' > Echo ' <ul> ' for ($i = 0; $i < $pageTotal; $i + +) {if ($page = = ($i + 1)) {echo ' <li><a href= ' blogfriends.php?page= '. $i + 1). "Class=" selected ">". ($i + 1). '
</a></li> '; else {echo ' <li><a href= ' blogfriends.php?page= '. ( $i + 1). ' " > '. ($i + 1). '
</a></li> ';
} echo ' </ul> ';

Echo ' </div> '; else if ($pageType = = 2) {echo ' <div id= ' pagetext ' > '; echo ' <ul> '; Echo ' <li> '. $page. ' /'. $pageTotal. ' Page |
</li> '; Echo ' <li> shared <strong> '. $total. ' </strong> Member |
</li> '; First if ($page = = 1) {echo ' <li> home | </li> '; echo ' <li> previous page | </li> ';} else {//$_server[' SCRIP T_name "] Gets the current script name, facilitates porting//can also customize constants, constant values and script file names consistent with Echo ' <li><a href= '. $_server[script_naME "]. '" > Home </a>|
</li> '; Echo ' <li><a href= '. $_server["Script_name". Page= '. ($page-1). ' " > Previous Page </a>|
</li> '; //Last page if ($page = = $pageTotal) {echo ' <li> next | </li> '; echo ' <li> last page | </li> ';} else {echo ' <li><a href= "'. $_server[" Script_name ". Page= '. ($page + 1). ' " > next Page </a>|
</li> '; Echo ' <li><a href= '. $_server["Script_name". Page= '. ($pageTotal). " > Last </a>|
</li> ';
Echo ' </ul> ';
Echo ' </div> ';

 }
}

Parameter explanation:

$pageTotal is the total number of pages, $page is the current page, $total is the total amount of data obtained from the database;

To simplify, encapsulate all of the parameters

Paging parameter
/**
* $sql An SQL statement that can get the total number of data
* $size display the number of bars per page
/function Pageparam ($sql, $size)
{
//Set global variables for all parameters involved//
$pagestart where a page starts
//$total Total Records $page a page $pageTotal total pages
global $pagestart, $ PageSize, $total, $page, $pageTotal;
$pagesize = $size;
Get Total data
$total = mysql_num_rows (Querydb ($sql));

Error handling, first to determine if there is
an if (isset ($_get[' page '))
{
//specific page
$page = $_get[' page '];
Determine if NULL (0 is NULL)/less than 0/is a number if
(Empty ($page) | | $page < 0 | |!is_numeric ($page))
{
$page = 1;
}
else
{
$page = intval ($page);//rounding to prevent decimal occurrences
}

}
else
{
//Initialize display 1th page
$page = 1;

//Database Clear 0
if ($total = = 0)
{
//set to 1
$pageTotal = 1;
}
The total number of pages of else {//pagination (in-one rounding)
$pageTotal = ceil ($total/$pagesize);
}

The number of pages is greater than the total page $total
if ($page > $pageTotal)
{
$page = $pageTotal;
}
When a page starts from a record
$pagestart = ($page-1) * $pagesize;
}

Parameter explanation:

$pagestart is when a page starts from a record, $pagesize is the number of records displayed per page

In use, call Pageparam First, and then call paging

/**
* First SQL statement that can get the total number of data
* The second page shows the number of bars
/Pageparam ("Select userid from User", 2);

<?php 
//Paging type 1 is a digital paging 2 is a text paging
paging (2);
? >

The location of the call is selected according to the specific situation, and the text is paginated as follows:

<?php 
//Paging type 1 is a digital paging 2 is a text paging
paging (1);
? > 

The digital paging is as follows:

The style adjusts itself.