MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysql_num_fields
Get number of fields in result
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 and related FAQ for more information. Alternatives to this function include:
mysqli_num_fields
|
PDOStatement::columnCount
|
int|false mysql_num_fields(resource result);
Retrieves the number of fields from a query.
result
The result resource that is being
evaluated. This result comes from a call to
mysql_query
.
Returns the number of fields in the result set
resource on success or false
on failure.
Example 6.43 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); ?>
For backward compatibility, the following deprecated alias may
be used: mysql_numfields
mysql_select_db
|
mysql_query
|
mysql_fetch_field
|
mysql_num_rows
|