Extracting numeric from string [WAS: Re: php4 vs. php5]

[Paul Novitski <paul@xxxxxxxxxxxxxxxxxxx>]

At 04:52 PM 2/2/2006, Keith Proctor wrote:
> I need to add two numbers together, unfortunately one of them is a
> string that starts with a character.  I'd like to convert a string
> such as 'x5' to the number 5.


Keith,

You could chop characters off the front until you've got a numeric:

        while (!is_numeric($sString) && $sString > "")
        {
                $sString = substr($sString, 1);
        }

or you could delete all non-numeric characters wherever they appear:

        $sString = preg_replace("/[^\d\.\-]/", "", $sString);

Paul 

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