Re: Stripping chars in string but leaving numerics

At 10:35 AM +0200 8/2/00, Anders Dannberg wrote:

I managed to get it to work with ereg_replace ($tesstr = ereg_replace ("[a-z, A-Z, / etc etc...]", "", $string); However, this solution seems alot smoother. Thanks for the help! Anders

Actually, to be even cleaner: $CleanedString = ereg_replace('[^[:digit:]]', '' $string); will remove everything that's not a digit. - steve edberg

So if i have a string with value "abcd*()123" i want the output to be "123"

In the case above I'd use a regular expression to match this. For that task you'll need the /d instruction which matches digits. In your example matching the 123 would be easy: preg_match("/(\d+)/i", "abcd*()123", $matches) $matches will be an array, and $matches[0] contains the whole string, and $matches[1] contains the first match from a pattern in paranthesis, i.e. the $matches[1] = "123" What happens? /d+ matches a digit one or more times, that's what the plus sign means. preg_match is a Perl Regular Expression match found in PHP 3.0.9 and ahead. If you'd had a string like "321abcd*()123" and wanted the "321123" out you might have to loop over the preg_match. --Jesper

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| Steve Edberg                           University of California, Davis |
| sbedberg@ucdavis.edu                               Computer Consultant |
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