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Website Programming in PHP / MYSQL
mysql_num_fields
(PHP 4, PHP 5, PECL mysql:1.0)
mysql_num_fields — Get number of fields in result
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()
