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mysql_list_fields

Name

mysql_list_fields — Fetches information about the fields in a table.

Synopsis

mysql result mysql_list_fields(database, table[, connection]);
string database: Database to use
string table: Table to use
mysql link connection (optional): Connection handle returned by mysql_connect() or mysql_pconnect()

Returns

MySQL result handle; FALSE on error

Description

mysql_list_fields() retrieves information about the fields in the specified table and returns a mysql result handle that can be used with mysql_field_flags() , mysql_field_len() , mysql_field_name() , and mysql_field_type() . If the connection() argument is not set, the last connection opened is used by default. If no connection is open, mysql_list_fields() attempts to connect to a MySQL database by calling mysql_connect() without arguments.

Version

PHP 3+, PHP 4+

See also

Gather information on the databases on a MySQL server

mysql_list_dbs()

Gather information on the tables in a database

mysql_list_tables()



Example

Example 819. Display a list of all fields for a given table

<?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');

$table = 'user';

$result_handle = mysql_list_fields ($db, $table)
   or die ("mysql_list_fields () failed with this error message: '" . mysql_error () . "'");

$number_fields = mysql_num_fields ($result_handle);

echo "Table '$table' in database '$db' contains $number_fields fields:<ol>";

for ($index=0; $index < $number_fields; ++$index) {
   echo '<li>', mysql_field_name ($result_handle, $index), '</li>';
}
echo '</ol>';
?>



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.

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