Php/docs/function.fbsql-fetch-field
fbsql_fetch_field
(PHP 4 >= 4.0.6, PHP 5 < 5.3.0)
fbsql_fetch_field — Get column information from a result and return as an object
说明
fbsql_fetch_field
( resource $result
[, int $field_offset
] ) : object
Used in order to obtain information about fields in a certain query result.
参数
result- 由 fbsql_query() 或 fbsql_db_query() 返回的结果标识符。
field_offset- The numerical offset of the field. The field index starts at 0. If not specified, the next field that wasn't yet retrieved by fbsql_fetch_field() is retrieved.
返回值
Returns an object containing field information, or false on errors.
The properties of the object are:
- name - column name
- table - name of the table the column belongs to
- max_length - maximum length of the column
- not_null - 1 if the column cannot be
null - type - the type of the column
范例
Example #1 fbsql_fetch_field() example
<?phpfbsql_connect($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_lengthname: $meta->namenot_null: $meta->not_nulltable: $meta->tabletype: $meta->type</pre>"; $i++;}fbsql_free_result($result);?>
