mysql_num_fields

(PHP 4, PHP 5)

mysql_num_fields — Get number of fields in result

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:

• mysqli_field_count()
• PDOStatement::columnCount()

Description

int mysql_num_fields ( resource $result )

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