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mysql_error

Name

mysql_error — Gets the error message from the last MySQL operation.

Synopsis

string mysql_error([connection]); mysql link connection (optional): Connection handle returned by mysql_connect() or mysql_pconnect()

Returns

String on success; FALSE on error

Description

mysql_error() returns the MySQL error message from the last MySQL function call that invoked a MySQL client routine. If no error occurred, an empty string ("") is returned.

Version

PHP 3+, PHP 4+

Example

Example 799. Determine whether a query succeeded and display an error message if it didn't

<?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');

// Go insane and try to use Objective COBOL instead of SQL in your query
$cobol = "perform varying idx from 1 by 1 until idx > nbrPlayers";

// Suppress errors with a single at (@) symbol
$mysql_result = @ mysql_query ($cobol);

$error = mysql_error ();

if ($error === '') {
    echo "I can't believe it, query '$cobol' actually worked. Uncle Monty, I'm scared...";
} else {
    echo "Thankfully, query '$cobol' failed! The error message generated was \"$error\"!";
}
?>

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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.