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Loading ...How would I validate a 5 digit zip code in PHP?
I have a PHP form. It asks for a 5 digit zip code, I have it set now to make sure they enter something in the field with Javascript validation, but how can I validate they have entered a 5 digit number? Please include sample code or link to sample code. Thanks so much.
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You can either verify this value with Javascript or PHP, but I would probably recommend you use PHP, as Javascript validation won’t always work – e.g. if someone has javascript disabled.
You can use PHP regular expressions to match many different things. In your case, the proper code to use would be
<?php
$user_zip = "12345"; //sample zip code
$match = preg_match("#[0-9]{5}#", $user_zip);
?>
The variable $match will either be 1 (for a match) or 0 (for no matches) – You can then use this to determine whether to accept the value or not.
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I wrote the javascript once to validate a zip code box in a form but I don’t have the code in front of me. If no one else gets you a good answer, send me your e-mail address through my profile and i’ll send you the code ( it’s on my computer at home).
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http://www.codetoad.com/javascript/isnumeric.asp Just leave the ‘.’ out of ValidChars.
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It seems to me the simplest solution is to fix the width of the zip code form element to a max of 5, then use either JS or PHP to check that the data is >10000, which is a trivial comparison in either language.
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Hello,
Below is an example PHP fragment for confirming that a ZIP code submitted by the user is indeed a 5-digit number. (This would not work for people from countries other than the U.S.)
<?php
if(preg_match("/^[0-9]{5}$/", $form_zipcode)) {
echo "The ZIP code must be a 5-digit number.";
}
?>
Sean Colicchio
Server Engineer
Host My Site
http://www.hostmysite.com/?utm_source=bb
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