mysql_field_flags Get the flags associated with the specified field in a result stringmysql_field_flags resourceresult intfield_offset mysql_field_flags 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. 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" et "timestamp". not_null [1] => primary_key [2] => auto_increment ) */ ?> ]]> For downward compatibility mysql_fieldflags can also be used. This is deprecated, however.