remove non-numeric characters?

[bliss322]

i need to remove all non-numeric characters from a currency string.

i could just do a ereg_replace () on characters i expect to see, like a "$" or a ","

but how can i use that type of function for any non-numeric character?

thanks

[planetsim]

Id use either is_numeric but that wont allow $ signs

So you need to use regex

$string = preg_match("[$][0-9]",$string);

if($string != 1)
{
//not valid
}
else
{
//valid
}

Not sure how you would replace the non-numeric characters so thats probably a good start.

Not sure if the regex works though i didnt test it.

[jimson]

this can't replace... but maybe can help you explore a bit.

XV. Character type functions

reffer to PHP Manual

[cgraz]

How about

$var = "45*(&d6sa78";
$var = ereg_replace("[^[:digit:]]", "", $var);

Cgraz