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Php paging Functions

Source: Internet
Author: User
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<? Php
/*
Requirement: Create a test database and create a test table in it.
You only need to enter the id field ..
Due to the limited level, errors are inevitable ..
*/
$ Conn = mysql_connect ("localhost", "root ","");

$ Maxnum = 2; // number of records per page

Mysql_select_db ("test", $ conn );
$ Query1 = "select count (*) AS totalrows FROM test ";
$ Result1 = mysql_query ($ query1, $ conn) or die (mysql_error ());
$ Row1 = mysql_fetch_assoc ($ result1 );
$ TotalRows1 = $ row1 ['totalrows']; // The total number of data entries in the dataset.
$ Totalpages = ceil ($ totalRows1/$ maxnum); // calculates the total number of pages that can be viewed. ceil () is the preceding function.

If (! Isset ($ _ GET ['page']) |! Intval ($ _ GET ['page']) | $ _ GET ['page']> $ totalpages) $ page = 1; // default processing of three types of errors
// When the url parameter page does not exist and the page number is not in decimal order, the default value is 1 when the page is larger than the number of split pages.
Else $ page =$ _ GET ['page'];

$ Startnum = ($ page-1) * $ maxnum; // this parameter is obtained from entry $ startnum of the dataset. Note that the dataset starts from 0.

$ Query = "SELECT * FROM test LIMIT $ startnum, $ maxnum"; // SELECT the $ maxnum row starting FROM $ startnum
$ Result = mysql_query ($ query, $ conn) or die (mysql_error ());
$ Row = mysql_fetch_assoc ($ result );

?>
<Html>
<Head>
<Meta http-equiv = "Content-Type" content = "text/html; charset = gb2312">
<Title> paging example </title>
<Script language = "JavaScript" type = "text/JavaScript">
<! --
Function MM_jumpMenu (targ, selObj, restore) {// v3.0
Eval (targ + ". location = '" + selObj. options [selObj. selectedIndex]. value + "'");
If (restore) selObj. selectedIndex = 0;
}
// -->
</Script>
<Style type = "text/css">
A {text-decoration: none ;}
A: hover {text-decoration: underline}
Table {font-size: 12px ;}
. Tb {background-color: #73BB95}
. Tr {background-color: # FFFFFF}
</Style>
</Head>

<Body>
<Table width = "30%" border = "0" align = "center" cellpadding = "0" cellspacing = "1" class = "tb">
<Tr>
<Td height = "24"> <div align = "left"> paging example </div> </td>
</Tr>
<? Php if ($ totalRows1) {// the record set is not empty.
Do {
?>
<Tr class = "tr">
<Td height = "24"> <div align = "center"> <? Php echo $ row ['id'];?> </Div> </td>
</Tr>
<? Php} while ($ row = mysql_fetch_assoc ($ result);?>
</Table>

<Table width = "95%" border = "0" align = "center" cellpadding = "0" cellspacing = "0">
<Tr> <form name = "form1">
<Td height = "27"> <div align = "center">
<? Php
Echo "A total of <font color = \" # ff0000 \ "> $ totalRows1 </font> records ";
Echo "<font color = \" # ff0000 \ ">". $ page. "</font>". "/". $ totalpages. "page ";

// Implement <1 2 3 4 5> paging links
$ Pre = $ page-1; // Previous page
$ Next = $ page + 1; // next page
$ Maxpages = 4; // when processing pages <1 2 3 4> display 4 pages
$ Pagepre = 1; // if the current page is 4, the first $ pagepre page is displayed, as shown in <3/4/5 6>.

If ($ page! = 1) {echo "<a href = '". $ _ SERVER ['php _ SELF']. "'> </a> ";
Echo "<a href = '". $ _ SERVER ['php _ SELF']. '? Page = '. $ pre. "'> </a> ";}

If ($ maxpages >=$ totalpages) // if the total number of records is insufficient, four pages are displayed.
{$ Pgstart = 1; $ pgend = $ totalpages;} // you can print out a different page.
Elseif ($ page-$ pagepre-1 + $ maxpages)> $ totalpages) // as if the total number of pages is 6 and the current number is 5, the previous 3 4 is displayed, not just 4
{$ Pgstart = $ totalpages-$ maxpages + 1; $ pgend = $ totalpages ;}
Else {
$ Pgstart = ($ page <= $ pagepre )? 1 :( $ page-$ pagepre); // when the current page is 1, it will only be 1 2 3 4 >>> not 0 1 2 3 >>>
$ Pgend = ($ pgstart = 1 )? $ Maxpages :( $ pgstart + $ maxpages-1 ));
}

For ($ pg = $ pgstart; $ pg <= $ pgend; $ pg ++) {// jump menu
If ($ pg = $ page) echo "<a href = \" ". $ _ SERVER ['php _ SELF ']."? Page = $ pg \ "> <font color = \" # ff0000 \ "> $ pg </font> </a> ";
Else echo "<a href = \" ". $ _ SERVER ['php _ SELF ']."? Page = $ pg \ "> $ pg </a> ";
}
If ($ page! = $ Totalpages)
{Echo "<a href = '". $ _ SERVER ['php _ SELF']. '? Page = '. $ next. "' >></a> ";
Echo "<a href = '". $ _ SERVER ['php _ SELF']. '? Page = '. $ totalpages. "' >>></a> ";}
?>
<Select name = "menu1" onChange = "MM_jumpMenu ('parent', this, 0)">
<Option value = ""> select </option>
<? Php for ($ pg1 = 1; $ pg1 <= $ totalpages; $ pg1 ++ ){
Echo "<option value = \" ". $ _ SERVER ['php _ SELF ']."? Page = $ pg1 \ ">". $ pg1. "</option> ";
}?>
</Select>
</Td> </form>
</Tr>
</Table>
<? Php} else {// when the record set is empty?>
<Tr class = "tr">
<Td height = "24"> <div align = "center"> no records </div> </td>
</Tr>
</Table>
<? Php }?>
</Body>
</Html>
<? Php
Mysql_free_result ($ result1 );
Mysql_free_result ($ result );
?>

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Related Keywords:
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