mysql_num_fields

(PHP 4, PHP 5)

mysql_num_fields — Get number of fields in result

Warning

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:

Description

function mysql_num_fields(resource $result): int|false

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()