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odbc_binmode

Handling of binary column data (PHP 4, PHP 5)
bool odbc_binmode ( resource result_id, int mode )

(ODBC SQL types affected: BINARY, VARBINARY, LONGVARBINARY)

  • ODBC_BINMODE_PASSTHRU: Passthru BINARY data
  • ODBC_BINMODE_RETURN: Return as is
  • ODBC_BINMODE_CONVERT: Convert to char and return

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".

Table 229. LONGVARBINARY handling

binmodelongreadlenresult
ODBC_BINMODE_PASSTHRU0passthru
ODBC_BINMODE_RETURN0passthru
ODBC_BINMODE_CONVERT0passthru
ODBC_BINMODE_PASSTHRU0passthru
ODBC_BINMODE_PASSTHRU>0passthru
ODBC_BINMODE_RETURN>0return as is
ODBC_BINMODE_CONVERT>0return as char


If odbc_fetch_into() is used, passthru means that an empty string is returned for these columns.

If result_id is 0, the settings apply as default for new results.

Note:

Default for longreadlen is 4096 and binmode defaults to ODBC_BINMODE_RETURN. Handling of binary long columns is also affected by odbc_longreadlen()


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