MYSQL_NUM_FIELDS(3) 1 MYSQL_NUM_FIELDS(3)
mysql_num_fields - Get number of fields in result
SYNOPSIS
Warning
This extension is deprecated as of PHP 5.5.0, and will be removed in the future. 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:
omysqli_field_count(3)
o PDOStatement::columnCount
int mysql_num_fields (resource $result)
DESCRIPTION
Retrieves the number of fields from a query.
o $
result -The result resource that is being evaluated. This result comes from a call to mysql_query(3).
Returns the number of fields in the result set resource on success or FALSE on failure.
Example #1
A mysql_num_fields(3) 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(3)
mysql_select_db(3), mysql_query(3), mysql_fetch_field(3), mysql_num_rows(3).
PHP Documentation Group MYSQL_NUM_FIELDS(3)
