This function returns an array of 3 values that makes browsing through your SQL results, or any other list of results, very easy. The navigation bar looks very similar to ones used in most sites [ prev 6 7 8 9 10 next ]. You can limit the amount of rows displayed, the amount of page numbers to display, the previous and next buttons/text. etc.
By : vicus
<?
/*
******************************
* Easy Result Navigator 1.3 *
******************************
Author: Wikus Stander
wikus[at]iamdev[dot]com
http://www.iamdev.com
_ __
(_)__ ___ _ ___/ /__ _ __ _______ __ _
/ / _ `/ ' \/ _ / -_) |/ /_ / __/ _ \/ ' \
/_/\_,_/_/_/_/\_,_/\__/|___/(_)\__/\___/_/_/_/
Copyright:
You may use this function freely. I hope you will
respect the author's intellectual property by:
- keeping this notice in your source, and
- dropping the author a mail: wikus[at]iamdev[dot]com
Thanx.
-------
Changes
-------
01-09-2003: In my example I rather suggest using the COUNT(*) function in the first
SQL query instead of mysql_num_rows(). This would make it return the 'totalrows'
value much faster, especially when there are lots of rows to return..
17-02-2003: Fixed a few bugs when using the next previous links (It would forget the
mysql limit position, etc.) I've removed an argument (start), and you cannot click
on the current selected page anymore. So a few less lines of code and arguments
that makes all the difference. enjoy :)
22-01-2003: Changed variables used in the example at the end of this document to
the global $_GET array. I found most users are running php with register_globals
turned off (php.ini). Thanx Tim Noble for the email :)
-----
To Do
-----
I've had some requests for making it support MSSQL (MSSQL doesn't support the LIMIT
clause) But I'm sure there is a way to get around it :) Keep checking this page...
-----------
Description
-----------
The function returns an array of 3 values as described below:
VALUE 1 [0]: Returns a string that can be appended to your SQL query so that the
correct block of rows can be returned. Eg. " LIMIT 10, 20"
VALUE 2 [1]: Returns an html string that gives the user an indication of which rows
he's currently browsing. Eg. 11-20
VALUE 3 [2]: Returns an html navigation bar needed for navigating through the total
result returned Eg. Page: << 6 7 8 9 10 >>
---------
Arguments
---------
The first 4 arguments are declared/assigned by you while the last 3 are done when
you start using the navigation bar generated by the function (See 'Usage' below).
totalrows - The TOTAL amount of rows returned by your executed SQL statement
numLimit - The amount of page numbers you'd like displayd in your navigation bit
Eg. '4' would display "Page: 1 2 3 4 Next 4 >>"
amm - The amount of rows returned per page (for the SQL string to append)
queryStr - If you'd like extra vars to be passed to that page Eg. "&name=value"
There are also 3 variables inside the function you can change if you'd like the
navigation bar to look a little different (larrow,rarrow,wholePiece).
-----
Usage
-----
See 'Usage' at the end of this document.
*/
function pageBrowser($totalrows,$numLimit,$amm,$queryStr,$numBegin,$begin,$num) {
$larrow = " << Prev ".$numLimit." "; //You can either have an image or text, eg. Previous
$rarrow = " Next ".$numLimit." >> "; //You can either have an image or text, eg. Next
$wholePiece = "Page: "; //This appears in front of your page numbers
if ($totalrows > 0) {
$numSoFar = 1;
$cycle = ceil($totalrows/$amm);
if (!isset($numBegin) || $numBegin < 1) {
$numBegin = 1;
$num = 1;
}
$minus = $numBegin-1;
$start = $minus*$amm;
if (!isset($begin)) {
$begin = $start;
}
$preBegin = $numBegin-$numLimit;
$preStart = $amm*$numLimit;
$preStart = $start-$preStart;
$preVBegin = $start-$amm;
$preRedBegin = $numBegin-1;
if ($start > 0 || $numBegin > 1) {
$wholePiece .= "<a href='?num=".$preRedBegin
."&numBegin=".$preBegin
."&begin=".$preVBegin
.$queryStr."'>"
.$larrow."</a>\n";
}
for ($i=$numBegin;$i<=$cycle;$i++) {
if ($numSoFar == $numLimit+1) {
$piece = "<a href='?numBegin=".$i
."&num=".$i
."&begin=".$start
.$queryStr."'>"
.$rarrow."</a>\n";
$wholePiece .= $piece;
break;
}
$piece = "<a href='?begin=".$start
."&num=".$i
."&numBegin=".$numBegin
.$queryStr
."'>";
if ($num == $i) {
$piece .= "</a><b>$i</b><a>";
} else {
$piece .= "$i";
}
$piece .= "</a>\n";
$start = $start+$amm;
$numSoFar++;
$wholePiece .= $piece;
}
$wholePiece .= "\n";
$wheBeg = $begin+1;
$wheEnd = $begin+$amm;
$wheToWhe = "<b>".$wheBeg."</b> - <b>";
if ($totalrows <= $wheEnd) {
$wheToWhe .= $totalrows."</b>";
} else {
$wheToWhe .= $wheEnd."</b>";
}
$sqlprod = " LIMIT ".$begin.", ".$amm;
} else {
$wholePiece = "Sorry, no records to display.";
$wheToWhe = "<b>0</b> - <b>0</b>";
}
return array($sqlprod,$wheToWhe,$wholePiece);
}
/*
+-------+
| Usage |
+-------+
NOTE!: This is just an example and WON'T WORK if you include
this in your code, comment it out or delete it :)
*/
$criterea = " WHERE column=value AND column_2=value_2";
$sql = "SELECT COUNT(*) AS totalrows FROM table".$criterea;
//get the total amount of rows returned
$arr = mysql_fetch_array(mysql_query($sql));
/*
Call the function:
I've used the global $_GET array as an example for people
running php with register_globals turned 'off' :)
*/
$navigate = pageBrowser($arr[totalrows],10,10,"&name=value",$_GET[numBegin],$_GET[begin],$_GET[num]);
//execute the new query with the appended SQL bit returned by the function
$sql = "SELECT * FROM table".$criterea.$navigate[0];
$rs = mysql_query($sql);
//the indication of which rows are being browsed. Eg. listing 1-10 of 100 results.
echo "<p>Listing ".$navigate[1]." of ".$totalrows." results.</p>";
//the navigation bar returned by the function
echo "<p>".$navigate[2]."</p>";
//loop and display the limited records being browsed
while ($arr = mysql_fetch_array($rs)) {
echo $arr[column_1]." ".$arr[column_2]."<br>";
}
//the navigation bar at the bottom again
echo "<p>".$navigate[2]."</p>";
/*
I hope this can come in handy :)
*/
?>
| DISCLAIMER: The content provided in this article is not warranted or guaranteed by Developer Shed, Inc. The content provided is intended for entertainment and/or educational purposes in order to introduce to the reader key ideas, concepts, and/or product reviews. As such it is incumbent upon the reader to employ real-world tactics for security and implementation of best practices. We are not liable for any negative consequences that may result from implementing any information covered in our articles or tutorials. If this is a hardware review, it is not recommended to open and/or modify your hardware. |
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