Remove backslashes from a string

I'm trying to replace \/ with / a string in PHP.

The string I have is:

http:\/\/xxx.xxx\/xxx

I want to replace the

\/

with just

/

(to give http://xxx.xxx/xxx).

All the escapes and stuff are confusing me!

I've tried every combination I can think of. I thought:

$str = preg_replace("\ \\ \/ /", "/ \/ /", $str);

would do the trick (removing the spaces) but no luck.

Regex add complexity, use a simple str_replace:

$str = str_replace('\/', '/', $str);

Test

$str="http:\/\/xxx.xxx\/xxx";
$str= str_replace("\/", "/", $str);
echo $str;

Output

http://xxx.xxx/xxx