regex - PHP - Email Validation -

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possible duplicate:
email address validation

hello. have function validate email address

function isvalidemail($email){  return eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email); }

it works domain zones .com, .us etc, contain 2 3 symbols after dot. question is: important include such zones .info or .travel length more 3 symbols , should worry multiple .co.uk etc.? how improve function these needs?

there native function in php this, test , see if fits needs:

var_dump(filter_var('bob@example.com', filter_validate_email));

p.s: isn't eregi() deprecated?


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