On 02/06/15 23:20, Aziz Saleh wrote:
On Tue, Jun 2, 2015 at 11:08 PM, Ron Piggott
<ron.piggott@xxxxxxxxxxxxxxxxxx
<mailto:ron.piggott@xxxxxxxxxxxxxxxxxx>> wrote:
On 02/06/15 22:58, Aziz Saleh wrote:
On Tue, Jun 2, 2015 at 10:50 PM, Ron Piggott
<ron.piggott@xxxxxxxxxxxxxxxxxx
<mailto:ron.piggott@xxxxxxxxxxxxxxxxxx>> wrote:
I am working through the process of removing \'s from the
database. I am trying to get this query using a variable
starting with "<<<"
$query1 =<<<EOF
UPDATE `TABLE_NAME` SET `COLUMN_NAME` =
REPLACE(REPLACE(REPLACE(`COLUMN_NAME`,'\\\'','\''),'\\\"','"'),'\\\\','\\');
EOF;
But when I go to execute the query I am getting the error:
|#1064 - You have an error in your SQL syntax; check the
manual that corresponds to your MariaDB server version for
the right syntax to use near '\''),'\\"','"'),'\\','\')' at
line 1 |
Could someone help me know what \ and ' should be part of
this query so it will execute correctly --- only removing \'s
from the database table text columns?
Thank you.
Ron
When you say remove, as replace all occurrences with an empty
string, or replace with a different character?
I want \" to become just "
I want \' to become just '
I also want however \ was escaped to become just \
(I am trying to revert the text back to what it was originally
before mysql_escape_string was applied)
I hope this helps elaborate.
Ron
For simplicity sake, do each one in its own query and see which one
breaks if any:
$query1 =<<<EOF
UPDATE `TABLE_NAME` SET `COLUMN_NAME` = REPLACE(`COLUMN_NAME`,'\"','"')
EOF;
$query2 =<<<EOF
UPDATE `TABLE_NAME` SET `COLUMN_NAME` = REPLACE(`COLUMN_NAME`,"\'","'")
EOF;
$query3 =<<<EOF
UPDATE `TABLE_NAME` SET `COLUMN_NAME` = REPLACE(`COLUMN_NAME`,'\\\\','\\')
EOF;
However, personally, I do not recommend this sort of action. Your data
should be escaped in the DB. Your MySQL driver should be handling the
escape/un-escape when setting/retrieving the data.
A friend pointed out to me today: In the earlier versions of PHP there
was a setting called 'magic_quotes_gpc'. When enabled slashes were
added by default. This setting has since been depreciated as of PHP 5.3
and was removed completely in PHP 5.4. I am using PHP 5.6.
Thank you for the suggestion of running 3 separate commands.
Individually these execute successfully. Is it even possible to do a
"REPLACE" in the fashion I have noted?
Ron
