WeberDev.com PHP and MySQL Code

LOG IN
BEGINNER GUIDESPHP CLASSESCODE SEARCHARTICLES SEARCHPHP FORUMSPHP MANUALPHP FUNCTIONS LISTWEB SITE TEMPLATES
Start typing to search for PHP and MySQL Code Snippets and Articles Search


Submit a code Example / Snippet Join us on FaceBook
Submit a code Example / Snippet Submit Your Code
Search Engine Optimization Monitor SEO Monitor
Web Site UpTime Monitor UpTime Monitor
Your Personal Examples List My Favorite Examples
Your Personal Articles List My Favorite Articles
Edit Account Info Update Your Profile
PHP Code Search
Web Development Forums
Learn MySQL Playing Trivia
PHPBB2 Templates
Web Development Resources
Web Development Content
PHPClasses
PHP Editor
PHP Jobs
Vision.To Design
Ajax Tutorials
PHP Programming Help
PHP/MySQL Programming
Webmaster Resources
Webmaster Forum
XML meta language
website builder



Go Back Add a Comment Send this example to a friend Add this Article to your personal favoritest for easy future access to your favorite Code Examples and Articles. Submit a code example Print this code example.
BACK ADD A COMMENT SEND TO A FRIEND ADD TO MY FAVORITES ADD CODE EXAMPLES PRINT
Title : SQL_CALC_FOUND_ROWS - How to know the number of rows a query would have returned if there was no LIMIT set on the query using php5 and mysqli.Usfull with Pagination (Paging).
Categories : PHP, Databases, MySQL Click here to Update Your Picture
Igal Rubinstein
Date : Jun 08th 2007
Grade : 3 of 5 (graded 3 times)
Viewed : 22396
File : No file for this code example.
Images : No Images for this code example.
Search : More code by Igal Rubinstein
Action : Grade This Code Example
Tools : My Examples List

Submit your own code examples  Submit your own code examples 
 

Many times we use the LIMIT option in MySQL to limit the number of records returned for a given
query. A feature most web developers commonly use is pagination. When showing the little numbers
pointing back and forth to previous and next pages, we need to both know how many records are in
total and at the same time we need to show only one page of results.

Many developers simply run the query twice. Once without the LIMIT to see how many records answer
the query and a second time to actually get the limited data needed to show.

Another approach to this is to use SQL_CALC_FOUND_ROWS. This methos is faster than running the same
query twice. Lets look at a simple query :

<?php
//Use $Result to show the data
$Result=mysqli_query($link,"SELECT SQL_CALC_FOUND_ROWS  FirstName,LastName From UserBase LIMIT 10");

// The number of rows that actually returned for the query (Can be less than the limit)
$NumberOfResults=mysqli_num_rows($Result);

$NORResult=mysqli_query($link,"Select FOUND_ROWS()");
$NORRow=mysqli_fetch_array($NORResult);

//This is the number of results that would have been returned if the query did not have LIMIT 10 at
//the end. You can now use this number to calculate the number of pages in your pagination.
$NOR=$NORRow["FOUND_ROWS()"];
?>


This code example will also work on PHP4, just use mysql_ instead of mysqli_.

From the MySQL Manual :
In the absence of the SQL_CALC_FOUND_ROWS option in the most recent SELECT statement, FOUND_ROWS()
returns the number of rows in the result set returned by that statement.
The row count available through FOUND_ROWS() is transient and not intended to be available past the
statement following the SELECT SQL_CALC_FOUND_ROWS statement. If you need to refer to the value later, save it.

More info at : http://dev.mysql.com/doc/refman/4.1/en/information-functions.html








bookmarker - PHP, PHPLIB, MySQL WWW based bookmark manager
Categories : MySQL, PHP, MySQL, Complete Programs, Databases
This program allows you to upload an ODBC ressource - i.e. an MS-Access database to a MySQL server.
Categories : Databases, MySQL, Complete Programs, PHP, Databases
email new items in db
Categories : PHP, Email, Databases, MySQL, Beginner Guides
Logs hits to any page which includes it. Automatically utilises page access information left behind by PHP/FI2.0.
Categories : Databases, PHP, mSQL, Databases
Download manager - A PHP script for adding a download page to any site.It also enables you track the no. of downloads.
Categories : PHP, Content Management, Filesystem, Databases, MySQL
GroupIT Engine v1.00rc1
Categories : PHP, Content Management, MySQL, Databases
mySQL/PHP/search with multientry form and table output with colored rows
Categories : PHP, Beginner Guides, MySQL, HTML and PHP, Databases
Editing the virtusertable and sendmail.cw via PHP3.0 and Mysql
Categories : MySQL, HTML and PHP, PHP, Databases
This function will populate the options in a drop down HTML select list in a form from a database query.
Categories : MySQL, General SQL, PHP, HTML and PHP, Databases
Newbie Notes #4 - Trapping dumb MySQL query errors
Categories : PHP, Databases, MySQL, Debugging, Beginner Guides
TAB_STRUCT Class: Is supporting Class for the DBXML Class
Categories : PHP, PHP Classes, MySQL, XML, Databases
MySQL database class
Categories : PHP, MySQL, Databases, PHP Classes
Three ways to access data selected by a mysql query
Categories : MySQL, PHP, Databases
Creating thumbnails from MySQL Blobs online
Categories : PHP, MySQL, Graphics, HTML and PHP, Databases
phpMyAdmin is a free software tool written in PHP intended to handle the administration of MySQL over the World Wide Web.
Categories : Databases, MySQL, Complete Programs, PHP