PHP encapsulated paging functions for text pagination and digital paging, _php tutorial

PHP encapsulated paging functions for text paging and digital paging,

Recently, paging was used in the project. Paging is a feature that is often used, so it is encapsulated in a functional form.

Sub-page sub-assembly
/**
* $pageType Paging Type 1 is the number page 2 is the text paging
* $pagetotal, $page, $total and other data can be passed as parameters, or in paging as global variables (recommended)
*/
function Paging ($pageType)
{
Global $pageTotal, $page, $total;
if ($pageType = = 1)
{
Echo ';
Echo
 
 

  
  

    '; 
   
for ($i =0; $i < $pageTotal; $i + +) 
   
{ 
   
if ($page = = ($i + 1)) 
   
{ 
   
Echo ' 
   
'. ($i + 1). '
'; 
   
} 
   
Else 
   
{ 
   
Echo ' 
   
'. ($i + 1). '
'; 
   
} 
   
} 
   
Echo ' 
  
 
 
';
Echo ';

}
else if ($pageType = = 2)
{
Echo ';
Echo '
 
 

  
  

    '; 
   
Echo ' 
   
'. $page. ' /'. $pageTotal. ' Page |
'; 
   
Echo ' 
   
A total of '. $total. ' A Member |
'; 
   
First page 
   
if ($page = = 1) 
   
{ 
   
Echo ' 
   
Home |
'; 
   
Echo ' 
   
Prev |
'; 
   
} 
   
Else 
   
{ 
   
$_server["Script_name"] gets the current script name for easy porting 
   
You can also customize constants, constant values and script filenames are consistent 
   
Echo ' 
   
Home |
'; 
   
Echo ' 
   
Prev |
'; 
   
} 
   
Last page 
   
if ($page = = $pageTotal) 
   
{ 
   
Echo ' 
   
Next Page |
'; 
   
Echo ' 
   
End |
'; 
   
} 
   
Else 
   
{ 
   
Echo ' 
   
Next Page |
'; 
   
Echo ' 
   
End |
'; 
   
} 
   
Echo ' 
  
 
 
';
Echo ';
}
}

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;

For simplicity, all parameters are encapsulated

Split-page parameter loading
/**
* $sql An SQL statement that can get the total number of data
* $size show the number of bars per page
*/
function Pageparam ($sql, $size)
{
Set the global variables for all the parameters involved
$pagestart where a page starts
$total total number of 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 determine if there is
if (Isset ($_get[' page '))
{
A specific page
$page = $_get[' page '];
Determines whether it is empty (0 is empty)/less than 0/whether it is a number
if (Empty ($page) | | $page < 0 | |!is_numeric ($page))
{
$page = 1;
}
Else
{
$page = Intval ($page); Rounding to prevent decimals from appearing
}
    
}
Else
{
Initialization shows page 1th
$page = 1;
}

Database zeroing
if ($total = = 0)
{
Set to 1
$pageTotal = 1;
}
Else
{
The total number of pages in the page (in-one rounding)
$pageTotal = Ceil ($total/$pagesize);
}

Pages larger than 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

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

  Paging Type 1 is a number page 2 is a text paging
   Paging (2);
?>  

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

    Paging Type 1 is a number page 2 is a text paging
    Paging (1);
?>  

The numbers are paginated as follows:

Style adjusts itself.

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