PHP: mysql_num_fields - Manual (original) (raw)

(PHP 4, PHP 5)

mysql_num_fields — Get number of fields in result

Description

Retrieves the number of fields from a query.

Parameters

result

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

Return Values

Returns the number of fields in the result set resource on success or [false](reserved.constants.php#constant.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