mysqli_result::fetch_field_direct, mysqli_fetch_field_direct

• mysqli_result::fetch_field_direct

  mysqli_fetch_field_direct

  Fetch meta-data for a single field

Description

Object oriented styleobject mysqli_result::fetch_field_direct(int fieldnr);

Procedural styleobject mysqli_fetch_field_direct(mysqli_result result,
int fieldnr);

Returns an object which contains field definition information from the specified result set.

Parameters

result

Procedural style only: A result set identifier returned by mysqli_query, mysqli_store_result or mysqli_use_result.

fieldnr

The field number. This value must be in the range from 0 to number of fields - 1.

Return Values

Returns an object which contains field definition information or FALSE if no field information for specified fieldnr is available.

Table 20.21. Object attributes

Attribute	Description
name	The name of the column
orgname	Original column name if an alias was specified
table	The name of the table this field belongs to (if not calculated)
orgtable	Original table name if an alias was specified
def	The default value for this field, represented as a string
max_length	The maximum width of the field for the result set.
length	The width of the field, as specified in the table definition.
charsetnr	The character set number for the field.
flags	An integer representing the bit-flags for the field.
type	The data type used for this field
decimals	The number of decimals used (for integer fields)

Examples

Example 20.184. Object oriented style

<?php
$mysqli = new mysqli('localhost', 'my_user', 'my_password', 'world');
/* check connection */
if (mysqli_connect_errno()) {
 printf('Connect failed: %s\n', mysqli_connect_error());
 exit();
}
$query = 'SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5';
if ($result = $mysqli->query($query)) {
 /* Get field information for column 'SurfaceArea' */
 $finfo = $result->fetch_field_direct(1);
 printf('Name: %s\n', $finfo->name);
 printf('Table: %s\n', $finfo->table);
 printf('max. Len: %d\n', $finfo->max_length);
 printf('Flags: %d\n', $finfo->flags);
 printf('Type: %d\n', $finfo->type);
 $result->close();
}
/* close connection */
$mysqli->close();
?>

Example 20.185. Procedural style

<?php
$link = mysqli_connect('localhost', 'my_user', 'my_password', 'world');
/* check connection */
if (mysqli_connect_errno()) {
 printf('Connect failed: %s\n', mysqli_connect_error());
 exit();
}
$query = 'SELECT Name, SurfaceArea from Country ORDER BY Name LIMIT 5';
if ($result = mysqli_query($link, $query)) {
 /* Get field information for column 'SurfaceArea' */
 $finfo = mysqli_fetch_field_direct($result, 1);
 printf('Name: %s\n', $finfo->name);
 printf('Table: %s\n', $finfo->table);
 printf('max. Len: %d\n', $finfo->max_length);
 printf('Flags: %d\n', $finfo->flags);
 printf('Type: %d\n', $finfo->type);
 mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>

The above examples will output:

Name: SurfaceArea Table: Country max. Len: 10
Flags: 32769
Type: 4

See Also

mysqli_num_fields

mysqli_fetch_field

mysqli_fetch_fields

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