char replace

[c_owl]

hi
im trying to change char in a text block but i cant get it to work.
can somone please help
the text is taken of another website and formatted. taking out any links and doubling " and ' so it can be added to my database (mysql)

i got this

$Temp = strip_tags($plot[1], '<br>');
    $Temp2=str_replace('"','""',$Temp);
    $plott[1]=str_replace("'","''",$Temp2);