Am trying to use something like:

$newdata = preg_replace($pattern, $replacement, $data);

Now my replacement is something like

$pattern = "/START(.*?)END/is";
$replacement = "START $config END";

Now, $config contains contents like

array('Test\\\'s Page')

The problem is that after I write the content, $newdata becomes

START array('Test\\'s Page') END

As you see above a single \ goes missing because it gets evaluated. How do I avoid that?