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mysql_num_rows
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mysql_num_rows

Name

mysql_num_rows — Gets the number of rows in a MySQL result handle.

Synopsis

int mysql_num_rows(result_handle); mysql result result_handle: Result handle returned by mysql_db_query() or mysql_query()

Returns

Integer; NULL on error

Description

mysql_num_rows() returns the number of rows in the specified MySQL result handle.

Version

PHP 3+, PHP 4+

Example

Example 822. Find out how many rows exist in a result handle

<?php
// Included code that connects to a MySQL server and sets a default database
// See the MySQL Functions chapter introduction for the source code for the file
include ('mysql_connect.inc.php');

// Get the current time and UNIX timestamp
$query = "SELECT * FROM user";

// Suppress errors for each line below with a single at (@) symbol
$mysql_result = @ mysql_query ($query);
$num_rows = @ mysql_num_rows ($mysql_result);

// Use the strict comparison operator to check whether $num_rows contains NULL
if (NULL === $num_rows)
   die ("Query '$query' failed with error message: \"" . mysql_error () . '"');

echo "Query '$query' returned $num_rows row(s) of data.";
?>

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PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). The authors of this book have elected not to choose any options under the OPL. This online book was obtained from http://www.fooassociates.com/phpfer/ and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.