(PHP 4, PHP 5)
mysql_num_fields — Get number of fields in result
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. Alternatives to this function include:
Retrieves the number of fields from a query.
result
The result resource that is being evaluated. This result comes from a call to mysql_query().
Returns the number of fields in the result set resource on
success or false
on failure.
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);?>
Note:
For backward compatibility, the following deprecated alias may be used: mysql_numfields()