odbc_binmode - Handling of binary column data
Вернуться к: ODBC Функции
odbc_binmode
(PHP 4, PHP 5, PHP 7)
odbc_binmode — Handling of binary column data
Описание
$result_id
, int $mode
)Enables handling of binary column data. ODBC SQL types affected are BINARY, VARBINARY, and LONGVARBINARY.
When binary SQL data is converted to character C data, each byte (8 bits) of source data is represented as two ASCII characters. These characters are the ASCII character representation of the number in its hexadecimal form. For example, a binary 00000001 is converted to "01" and a binary 11111111 is converted to "FF".
| binmode | longreadlen | result |
|---|---|---|
ODBC_BINMODE_PASSTHRU |
0 | passthru |
ODBC_BINMODE_RETURN |
0 | passthru |
ODBC_BINMODE_CONVERT |
0 | passthru |
ODBC_BINMODE_PASSTHRU |
0 | passthru |
ODBC_BINMODE_PASSTHRU |
>0 | passthru |
ODBC_BINMODE_RETURN |
>0 | return as is |
ODBC_BINMODE_CONVERT |
>0 | return as char |
If odbc_fetch_into() is used, passthru means that an empty string is returned for these columns.
Список параметров
-
result_id -
The result identifier.
If
result_idis 0, the settings apply as default for new results.Замечание: Default for longreadlen is 4096 and
modedefaults to ODBC_BINMODE_RETURN. Handling of binary long columns is also affected by odbc_longreadlen(). -
mode -
Possible values for
modeare:-
ODBC_BINMODE_PASSTHRU: Passthru BINARY data -
ODBC_BINMODE_RETURN: Return as is -
ODBC_BINMODE_CONVERT: Convert to char and return
-
Возвращаемые значения
Возвращает TRUE в случае успешного завершения или FALSE в случае возникновения ошибки.
Вернуться к: ODBC Функции