mysql_fetch_row
mysql_field_len
MySQL Functions
PHP Manual

# mysql_field_flags

Get the flags associated with the specified field in a result

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:

- mysqli_fetch_field_direct [flags]
- PDOStatement::getColumnMeta [flags]

### Description

string mysql_field_flags ( resource `$result` , int `$field_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.

### Parameters

`result`

  The result resource that is being evaluated. This result comes from a call to mysql_query.

`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.

### Return Values

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".

### Examples

Example #1 A mysql_field_flags 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
    )

### Notes

> Note:

> For backward compatibility, the following deprecated alias may be used: mysql_fieldflags

### See Also

- mysql_field_type
- mysql_field_len