odbc_binmode
Controls handling of binary column data. ODBC SQL types affected are BINARY, VARBINARY, and LONGVARBINARY. The default mode can be set using the uodbc.defaultbinmode php.ini directive.
When binary SQL data is converted to character C data (ODBC_BINMODE_CONVERT), 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".
While the handling of BINARY and VARBINARY columns only depend on the binmode, the handling of LONGVARBINARY columns also depends on the longreadlen as well:
| 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_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. If odbc_result is used, passthru means that the data are sent directly to the client (i.e. printed).
Parameters
- statement
-
The result identifier.
If statement is 0, the settings apply as default for new results.
- mode
-
Possible values for mode are:
ODBC_BINMODE_PASSTHRU: Passthru BINARY data
ODBC_BINMODE_RETURN: Return as is
ODBC_BINMODE_CONVERT: Convert to char and return
Note:
Handling of binary long columns is also affected by odbc_longreadlen.
Return Values
Returns true on success or false on failure.