(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 and related FAQ for more information. Alternatives to this function include:
$result
) : intRetrieves the number of fields from a query.
resultThe 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()