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# fbsql_fetch_field

(PHP 4 >= 4.0.6, PHP 5)

fbsql_fetch_field -- Get column information from a result and return as an object

## Description

object fbsql_fetch_field ( resource result [, int field_offset])

Returns an object containing field information.

fbsql_fetch_field() can be used in order to obtain information about fields in a certain query result. If the field offset isn't specified, the next field that wasn't yet retrieved by fbsql_fetch_field() is retrieved.

The properties of the object are:

- name - column name

- table - name of the table the column belongs to

- max_length - maximum length of the column

- not_null - 1 if the column cannot be `NULL`

- type - the type of the column

示範 1.fbsql_fetch_field() example

`<?php
fbsql_connect($host, $user, $password)
or die("Could not connect");
$result = fbsql_db_query("database", "select * from table")
or die("Query failed");
# get column metadata
$i = 0;
while ($i < fbsql_num_fields($result)) {
echo "Information for column $i:<br />\n";
$meta = fbsql_fetch_field($result);
if (!$meta) {
echo "No information available<br />\n";
}
echo "<pre>
max_length: $meta->max_length
name: $meta->name
not_null: $meta->not_null
table: $meta->table
type: $meta->type
</pre>";
$i++;
}
fbsql_free_result($result);
?>`

See also fbsql_field_seek().

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