PHP: Hypertext Preprocessor (original) (raw)

mysql_list_fields

(PHP 4, PHP 5)

mysql_list_fields — List MySQL table fields

Warning

This function was deprecated in PHP 5.4.0, and it and the entire original MySQL extension was removed in PHP 7.0.0. Instead, use either the actively developed MySQLi or PDO_MySQL extensions. See also the MySQL: choosing an API guide. Alternatives to this function include:

• SQL Query: SHOW COLUMNS FROM sometable

Description

This function is deprecated. It is preferable to use mysql_query() to issue an SQL SHOW COLUMNS FROM table [LIKE 'name'] statement instead.

Parameters

database_name

The name of the database that's being queried.

table_name

The name of the table that's being queried.

link_identifier

The MySQL connection. If the link identifier is not specified, the last link opened bymysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() had been called with no arguments. If no connection is found or established, an**[E_WARNING](errorfunc.constants.php#constant.e-warning)** level error is generated.

Examples

Example #1 Alternate to deprecated mysql_list_fields()

<?php $result = mysql_query("SHOW COLUMNS FROM sometable"); if (!$result) { echo 'Could not run query: ' . mysql_error(); exit; } if (mysql_num_rows($result) > 0) { while ($row = mysql_fetch_assoc($result)) { print_r($row); } } ?>

The above example will output something similar to:

Array ( [Field] => id [Type] => int(7) [Null] =>
[Key] => PRI [Default] => [Extra] => auto_increment ) Array ( [Field] => email [Type] => varchar(100) [Null] => [Key] => [Default] => [Extra] => )

Notes

Note:

For backward compatibility, the following deprecated alias may be used: mysql_listfields()

See Also

• mysql_field_flags() - Get the flags associated with the specified field in a result
• mysql_info() - Get information about the most recent query

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