Php/docs/function.mysql-num-fields

• PHP Manual
• MySQL Functions
• Get number of fields in result

mysql_num_fields

(PHP 4, PHP 5)

mysql_num_fields — Get number of fields in result

Warning This extension was deprecated in PHP 5.5.0, and it was removed in PHP 7.0.0. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:

• mysqli_num_fields()
• PDOStatement::columnCount()

Description

mysql_num_fields ( resource $result ) : int|false

Retrieves the number of fields from a query.

Parameters

result

The result resource that is being evaluated. This result comes from a call to mysql_query().

Return Values

Returns the number of fields in the result set resource on success or FALSE on failure.

Examples

Example #1 A mysql_num_fields() example

<?php$result = mysql_query("SELECT id,email FROM people WHERE id = '42'");if (!$result) {    echo 'Could not run query: ' . mysql_error();    exit;}/* returns 2 because id,email === two fields */echo mysql_num_fields($result);?>

Notes

Note:

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

See Also

• mysql_select_db() - Select a MySQL database
• mysql_query() - Send a MySQL query
• mysql_fetch_field() - Get column information from a result and return as an object
• mysql_num_rows() - Get number of rows in result