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
mysql_num_fields(resource
$result): int|falseRetrieves 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
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