fbsql_fetch_field
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
fbsql_fetch_field — Get column information from a result and return as an object
说明
fbsql_fetch_field (
resource
$result [,
int $field_offset ] ) :
object
Used in order to obtain information about fields in a certain query result.
参数
-
result -
由 fbsql_query() 或 fbsql_db_query() 返回的结果标识符。
-
field_offset -
The numerical offset of the field. The field index starts at 0. If not specified, the next field that wasn't yet retrieved by fbsql_fetch_field() is retrieved.
返回值
Returns an object containing field information, or FALSE on errors.
The properties of the object are:
- name - column name
- table - name of the table the column belongs to
- max_length - maximum length of the column
- not_null - 1 if the column cannot be
NULL - type - the type of the column
范例
Example #1 fbsql_fetch_field() example
<?php
fbsql_connect($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);
?>
