php man page for mysql_field_flags

MYSQL_FIELD_FLAGS(3)							 1						      MYSQL_FIELD_FLAGS(3)

mysql_field_flags - Get the flags associated with the specified field in a 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_fetch_field_direct(3) [flags]

		     o PDOStatement::getColumnMeta [flags]

       string mysql_field_flags (resource  $result, int  $field_offset)

DESCRIPTION
       mysql_field_flags(3) returns the field flags of the specified field. The flags are reported as a single word per flag separated by a single
       space, so that you can split the returned value using explode(3).

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

	      o $
		field_offset  -The  numerical  field  offset.  The  $field_offset  starts at 0. If $field_offset does not exist, an error of level
		E_WARNING is also issued.

	Returns a string of flags associated with the result or FALSE on failure.

	The following flags are reported, if your version of MySQL is current enough to support  them:	"not_null",  "primary_key",  "unique_key",
       "multiple_key", "blob", "unsigned", "zerofill", "binary", "enum", "auto_increment" and "timestamp".

       Example #1

	      A mysql_field_flags(3) example

	      <?php
	      $result = mysql_query("SELECT id,email FROM people WHERE id = '42'");
	      if (!$result) {
		  echo 'Could not run query: ' . mysql_error();
		  exit;
	      }
	      $flags = mysql_field_flags($result, 0);

	      echo $flags;
	      print_r(explode(' ', $flags));
	      ?>

	      The above example will output something similar to:

	      not_null primary_key auto_increment
	      Array
	      (
		  [0] => not_null
		  [1] => primary_key
		  [2] => auto_increment
	      )

       Note

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

       mysql_field_type(3), mysql_field_len(3).

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