First attempt, simple regex

[Enlightened]

Hello, This is my first attempt at regex. I would like to verify if its proper form.

<?php

if(!eregi('^[1-9]{2,3},|\.[0-9]{2,3}\.[0-9]{2}', stripslashes(trim($_POST['amount']) ) ) )

{

$problem = TRUE;

}
if(!$problem)
{
echo 'Thank you.';
}else{

echo 'Please go back and enter a proper ammount
}

?>

Basically it needs to check if the payment is in this form $10.00 or 100.00 or 10,000.00

Also i dont know how to allow it to do 1,000.00 without allowing 1.00 or 1,00.00

[pjleonhardt]

I'm not entirely sure on the regex...
Though you could simplify your if statements to

<?php

if(!(..correct regex... ) ) )
{
  echo 'Please go back and enter a proper amount';
}
else
{
  echo 'Thank you.';
}

?>