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#1
September 5th, 2002, 06:32 PM
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Field Validation
Hi there,
I want to make some validation for the email field in my form, I want to make sure that the "@" character is exists and the "." is exists also and the email shouldn't start with a space, name@domain.com // start with a space namedomain.com // doesn't have a "@" name@domaincom // doesn't have a "." So, I want to avoid people keep on submitting invalid addresses. How can I achieve this?
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#2
September 5th, 2002, 06:42 PM
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RE: Field Validation
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#3
September 5th, 2002, 07:12 PM
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RE: Field Validation
Here's a client-side version:
Code:
<script>
function checkemail(e){
var email=String(e.value);
if (email){
var reg=/^[w-]+(.[w-]+)*@[a-z0-9-]+(.a-z0-9-]+)*$/i
if (!reg.test(email)){
alert("The email address you have entered is invalid.");
if (String(navigator.appName)!='Netscape'){
e.focus();
}
} else {
alert("EMAIL OK");
}
}
}
</script>
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#6
September 5th, 2002, 07:37 PM
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RE: RE: Field Validation
Quote:
Why bother doing it client side if you do it server side? Surely that just increases filesize? Unless you use it for a JS alert() ???
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#8
September 5th, 2002, 09:44 PM
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RE: Field Validation
it is always A Good Thing [tm] to check user input on both client and server side.
let me explain: when u write some js code to check 10-15 input fields, it can add only about 1-2k on the html page, but when a user submits a page with error fields, u have to send him a hole page back, which is usualy over 50k of html (with adds and stuff) so, it is both for user's benefith, and for less traffic on your site...
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#10
September 7th, 2002, 02:43 AM
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RE: Field Validation
don't worry. it will all come with time and expiriense.
also, wondering on this kind of forums helps. well, just a year or two ago, i didn't know smth like this, and now i do. and if i can learn, i think everybody can ;)))
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#11
September 7th, 2002, 09:32 AM
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RE: Field Validation
That's the good thing - I would class myself as a good coder (advanced knowledge of PHP, HTML, CSS; resonable knowledge of Perl, JavaScript, MySQL) yet I come to these forums not only to help others but to learn. Since I have taught myself and not used a book, I have a particular style meaning that when I come across a problem, I would use a set method to solve it.
For example, up until about 3 weeks ago, I was trying to use functions to add data to the end of an array, not knowing that you could just use: $array[] = $data; It's the simple things that are so beneficial to your coding.
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#12
September 9th, 2002, 07:24 PM
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RE: Field Validation
to make it a "super" check, how about adding the ability to open a temporary connection to the hostname provided to see if it actually exists.
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#15
November 5th, 2002, 10:33 PM
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RE: Field Validation
I have a FORM built and I want to add a simple validation code for the email address. So far nothing works with my current FORM. Any ideas ??? (current FORM located here: http://www.partsadventure.com/request2.htm )
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