ereg checking if its only numbers

Ive been playing around with ereg for about half an hour and having no joy because I dont really understand the medhod behind it and how it all works. But what im trying to do is check to see if a 9 digit string is all numbers and nothing else $string1 = "123456789" $string2 = "123456abc" how would I check either string with an IF statement and make it continue on string 1 (ie, all numbers) and error on string 2 (not all numbers). Any suggestions ? Thanks Chris --

    Chris Aitken - Administration/Database Designer - IDEAL Internet

email: chris@ideal.net.au phone: +61 2 4628 8888 fax: +61 2 4628 8890

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