PHP encapsulate paging functions to implement text paging and digital paging. _ PHP Tutorial

PHP encapsulate paging functions to implement text paging and numeric paging ,. PHP encapsulate paging functions to implement text paging and numeric paging. recently, paging is used in projects. Paging is a frequently used function. Therefore, PHP encapsulation paging function is used to implement text paging and digital paging,

Recently, pagination is required in the project. The paging function is often used. Therefore, it is encapsulated as a function.

// Paging and sub-assembly
/**
* $ PageType paging Type 1: numeric paging 2: text paging
* You can pass $ pageTotal, $ page, $ total, and other data as parameters, or use paging as a global variable (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'
  
  
Total'. $ Total .'Members |
';
  
  
// Page 1
  
  
If ($ page = 1)
  
  
{
  
  
Echo'
  
  
Homepage |
';
  
  
Echo'
  
  
Previous Page |
';
  
  
}
  
  
Else
  
  
{
  
  
// $ _ SERVER ["SCRIPT_NAME"] get the name of the current script for ease of transplantation
  
  
// You can also customize constants. the constant value is consistent with the script file name.
  
  
Echo'
  
  
Homepage |
';
  
  
Echo'
  
  
Previous Page |
';
  
  
}
  
  
// Last Page
  
  
If ($ page = $ pageTotal)
  
  
{
  
  
Echo'
  
  
Next Page |
';
  
  
Echo'
  
  
Last page |
';
  
  
}
  
  
Else
  
  
{
  
  
Echo'
  
  
Next Page |
';
  
  
Echo'
  
  
Last page |
';
  
  
}
  
  
Echo'
 
 
';
Echo'
';
}
}

Parameter description:

$ PageTotal indicates the total number of pages, $ page indicates the current page, and $ total indicates the total number of data retrieved from the database;

To simplify the process, encapsulate all parameters.

// Split paging parameters
/**
* $ SQL: an SQL statement that obtains the total number of data.
* $ Size number of entries displayed on each page
*/
Function pageParam ($ SQL, $ size)
{
// Set global variables for all involved parameters
// $ Where does pagestart start from?
// $ Total number of records $ page a page $ total number of pageTotal pages
Global $ pagestart, $ pagesize, $ total, $ page, $ pageTotal;
$ Pagesize = $ size;
// Obtain the total number of data items
$ Total = mysql_num_rows (queryDB ($ SQL ));

// Handle the error. First, determine whether the error exists.
If (isset ($ _ GET ['Page'])
{
// Specific page
$ Page = $ _ GET ['Page'];
// Determine 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); // integer to prevent decimal occurrence
}
    
}
Else
{
// Page 1st is displayed during initialization.
$ Page = 1;
}

// Reset the database
If ($ total = 0)
{
// Set to 1
$ PageTotal = 1;
}
Else
{
// The total number of pages (one-to-one integer)
$ PageTotal = ceil ($ total/$ pagesize );
}

// The page number is greater than the total page number $ total
If ($ page> $ pageTotal)
{
$ Page = $ pageTotal;
}
// When the page starts from a record
$ Pagestart = ($ page-1) * $ pagesize;
}

Parameter description:

$ Pagestart: When a page starts from a record, $ pagesize indicates the number of records displayed on each page.

In use, call pageParam first, and then call paging

/**
* The first SQL statement that can obtain the total number of data
* Number of Entries displayed on the second page
*/
PageParam ("select userid from user", 2 );

<? Php
// Page Type 1: digital page 2: text page
Paging (2 );
?>

Select the call location based on the actual situation. the text page is as follows:

<? Php
// Page Type 1: digital page 2: text page
Paging (1 );
?>

The number page is as follows:

Adjust the style.

Paging is recently used in the project. The paging function is a frequently used function. Therefore, it is blocked in the form of a function...