Replacing "." with "," in a number

[DaRkZeAlOt]

hi,
im trying to replace a "." with a "," in a number (something like 99.21). I tried it in this way :

$price = ereg_replace(".", ",", $price);

but this returns only a "," as price :-/. A red something about that i've to put numbers in ' ' to use with this function but i doesn't seem to work...

[cyclops]

you should read the page about preg_replace on php.net,
it should tell you why following code does the job

$price = preg_replace("/\\./",",",$price)

[xblue]

why should you use regular expressions at all? str_replace() will do just as well.

you might want to check number_format() as another alternative.