php man page for mysql_num_fields

MYSQL_NUM_FIELDS(3)							 1						       MYSQL_NUM_FIELDS(3)

mysql_num_fields - Get number of fields in result

SYNOPSIS
       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:

		     omysqli_field_count(3)

		     o PDOStatement::columnCount

       int mysql_num_fields (resource  $result)

DESCRIPTION
	Retrieves the number of fields from a query.

	      o $
		result -The result resource that is being evaluated. This result comes from a call to mysql_query(3).

	Returns the number of fields in the result set resource on success or FALSE on failure.

       Example #1

	      A mysql_num_fields(3) 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);
	      ?>

       Note

	       For backward compatibility, the following deprecated alias may be used: mysql_numfields(3)

       mysql_select_db(3), mysql_query(3), mysql_fetch_field(3), mysql_num_rows(3).

PHP Documentation Group 												       MYSQL_NUM_FIELDS(3)