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# maxdb_fetch_field

(PECL)

maxdb_fetch_field

(no version information, might be only in CVS)

result->fetch_field -- Returns the next field in the result set

## Description

Procedural style:

mixed maxdb_fetch_field ( resource result )

Object oriented style (method):

class result {
mixed fetch_field ( void )
}

The maxdb_fetch_field() returns the definition of one column of a result set as an resource. Call this function repeatedly to retrieve information about all columns in the result set. maxdb_fetch_field() returns `FALSE` when no more fields are left.

## Return values

Returns an resource which contains field definition informations or `FALSE` if no field information is available.

表格 1. Object properties

Property | Description
--- | ---
name | The name of the column
max_length | The maximum width of the field for the result set.
type | The data type used for this field
decimals | The number of decimals used (for integer fields)

## See also

maxdb_num_fields() maxdb_fetch_field_direct() maxdb_fetch_fields() maxdb_field_seek()

## Example

範例 1. Object oriented style

`<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
$query = "SELECT name, cno from hotel.customer ORDER BY cno";
if ($result = $maxdb->query($query)) {
/* Get field information for all columns */
while ($finfo = $result->fetch_field()) {
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\n", $finfo->type);
}
$result->close();
}
/* close connection */
$maxdb->close();
?>`

範例 2. Procedural style

`<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()) {
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
$query = "SELECT name, cno from hotel.customer ORDER BY cno";
if ($result = maxdb_query($link, $query)) {
/* Get field information for all fields */
while ($finfo = maxdb_fetch_field($result)) {
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\n", $finfo->type);
}
maxdb_free_result($result);
}
/* close connection */
maxdb_close($link);
?>`

The above examples would produce the following output:

    Name:     NAME
    Table:
    max. Len: 10
    Flags:    -1
    Type:     2

    Name:     CNO
    Table:
    max. Len: 4
    Flags:    -1
    Type:     0

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