replacing double quotes

[coverman]

It seems like a simple issue:
replacing double quotes in a html document with single quotes by using PHP.
I really tried several functions but none did work, although I'm almost certain they should !
:mad:
For instance:
In $value I have my HTML document and tried:
1. $value = str_replace("\"","'",$value);
2. $value = ereg_replace("\"","'",$value);
3. $value = strtr($value,"\"","'");

Nothing changed :mad:

[pipe_girl]

Ereg_replace() works for me:

$value = ereg_replace("\"","'",$value);