PHP allow only numbers in string

[kruser]

Hello,

I am looking for a way to only allow the numbers 0-9 in a string. I would like to remove any other characters.

Example: $string="$1,234 Tom";
would like to script to make $string="1234";

I once saw someone do this as a sucurity measure, but can't find it.

[Alan-Hart]

I think this should do it:

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

[Alan-Hart]

preg_replace(), which uses a Perl compatible regular expression syntax, is a faster alternative to ereg_replace()

[kruser]

Thanks Alan,

Both functions worked for me.
Also thanks for the tip on the faster one.

[Alan-Hart]

No worries glad to help