failed to insert BLOB data on multibyte charset
i'm using GBK charset. mysql 4.01
use PHP to insert, did addslashes before insert
however, failed.
i've read the mysql_escape_string() source code. noticed that, mb char is
processed differently, but is it a must ?
yes, php+libmysql is not up to date, but i'm trying to use my own escaping
function
function &GBK_escape_string($data)
{
$ret = '';
$l = strlen($data);
for ($i = 0; $i < $l; $i ++)
{
$c = ord($data{$i});
if (0x81 <= $c && $c <= 0xfe && ($i+1) < $l)
{
$c2 = ord($data{$i+1});
if ((0x40<=$c2 && $c2<=0x7e) ||
(0x80<=$c2 && $c2<=0xfe))
{
$ret .= $data{$i};
$ret .= $data{++$i};
continue;
}
}
switch ($data{$i})
{
case "\\": $ret .= "\\\\"; break;
case "\0": $ret .= "\\0"; break;
case "\n": $ret .= "\\n"; break;
case "\r": $ret .= "\\r"; break;
case "'": $ret .= "\\'"; break;
case "\"": $ret .= "\\\""; break;
case "\032": $ret .= "\\Z"; break;
default: $ret .= $data{$i}; break;
}
}
return $ret;
}
still won't work
anyone could give me a hand?
i'm supposing the error:
string: ....\n\xE0'".....
according to ctype-gbk.c ismbchar_gbk
\xE0' is not mbchar, \xE0 should not escape, and ' should escaped.
result: ....\x5Cn\xE0\x5C'\x5C"..... (0x5C is backslash)
when mysqld scanning this string
\x5Cn is scan as \n, correct
but \xE0\x5C is scan as a GBK char, then ' will be a string terminator
and complain that
SQL syntax near '\"'
which is the escaped double-quote ...0x5C"...
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