CODEWITHSUNDEEP
phpmysql
Ryan
Ryan

Reputation: 12133

reverse mysql_real_escape_string

I have a piece of data that is large and will probably contain quotes and double quotes.

I'm using mysql_real_escape_string() to store it safely.

When I pull it out to look at it, all the quotes are escaped. I tried using str_replace to just get rid of all the quotes, but that turns \r\n's into rn. :(

How can I reverse it so the data comes back out the way it went in?

Upvotes: 14

Views: 19629

Answers (3)

Muhwu
Muhwu

Reputation: 1181

If you actually want to reverse that because of how your data is formatted, this is a solution I came up with:

function mysql_unreal_escape_string($string) {
    $characters = array('x00', 'n', 'r', '\\', '\'', '"','x1a');
    $o_chars = array("\x00", "\n", "\r", "\\", "'", "\"", "\x1a");
    for ($i = 0; $i < strlen($string); $i++) {
        if (substr($string, $i, 1) == '\\') {
            foreach ($characters as $index => $char) {
                if ($i <= strlen($string) - strlen($char) && substr($string, $i + 1, strlen($char)) == $char) {
                    $string = substr_replace($string, $o_chars[$index], $i, strlen($char) + 1);
                    break;
                }
            }
        }
    }
    return $string;
}

Upvotes: 2

jonathan
jonathan

Reputation: 101

Who says?

$keyword = "TEST'TEST";

$result1 = mysql_real_escape_string($keyword);
echo $result1 --> TEST\'TEST

$result2 = nl2br(stripslashes($result));
echo $result2 --> TEST'TEST

Upvotes: 10

OIS
OIS

Reputation: 10033

Do you use magic quotes?

Note: If magic_quotes_gpc is enabled, first apply stripslashes() to the data. Using this function [mysql_real_escape_string] on data which has already been escaped will escape the data twice.

Upvotes: 7

Related Questions