homepage Welcome to WebmasterWorld Guest from 54.161.240.10
register, free tools, login, search, pro membership, help, library, announcements, recent posts, open posts,
Become a Pro Member
Home / Forums Index / Code, Content, and Presentation / JavaScript and AJAX
Forum Library, Charter, Moderator: open

JavaScript and AJAX Forum

    
Adding checkdnsrr() function to a form validation?
Can I add this PHP function into a Javascript Form Validator?
Revata




msg:3942822
 1:08 am on Jun 30, 2009 (gmt 0)

Hi, I have a contact form and I'm wondering if there's a way to add the PHP checkdnsrr() function to my current validation:

<script type="text/JavaScript">
<!--
function MM_findObj(n, d) { //v4.01
var p,i,x; if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_validateForm() { //v4.0
var i,p,q,nm,test,num,min,max,errors='',args=MM_validateForm.arguments;
for (i=0; i<(args.length-2); i+=3) { test=args[i+2]; val=MM_findObj(args[i]);
if (val) { nm=val.name; if ((val=val.value)!="") {
if (test.indexOf('isEmail')!=-1) { p=val.indexOf('@');
if (p<1 p==(val.length-1)) errors+='- Please enter a valid email address.\n';
} else if (test!='R') { num = parseFloat(val);
if (isNaN(val)) errors+='- '+nm+' must contain a number.\n';
if (test.indexOf('inRange') != -1) { p=test.indexOf(':');
min=test.substring(8,p); max=test.substring(p+1);
if (num<min max<num) errors+='- '+nm+' must contain a number between '+min+' and '+max+'.\n';
} } } else if (test.charAt(0) == 'R') errors += '- Please enter your '+nm+'.\n'; }
} if (errors) alert('The following error(s) occurred:\n'+errors);
document.MM_returnValue = (errors == '');
}
//-->
</script>

I'd like to check the domain of an email address so I'd use something like this:

list($userName, $mailDomain) = split("@", $email);
if (checkdnsrr($mailDomain, "MX")) {


 

broniusm




msg:3943181
 2:02 pm on Jun 30, 2009 (gmt 0)

You cannot evaluate php on the client.

If your php is doing some real work (maybe going out and checking that $mailDomain exists out on the web or doing an imap connect to verify email address), you could consider building out an ajax call.

My guess, however, is that you are just doing some string manipulation against the user-provided strings which could be rewritten in javascript and done at the client.

Global Options:
 top home search open messages active posts  
 

Home / Forums Index / Code, Content, and Presentation / JavaScript and AJAX
rss feed

All trademarks and copyrights held by respective owners. Member comments are owned by the poster.
Home ¦ Free Tools ¦ Terms of Service ¦ Privacy Policy ¦ Report Problem ¦ About ¦ Library ¦ Newsletter
WebmasterWorld is a Developer Shed Community owned by Jim Boykin.
© Webmaster World 1996-2014 all rights reserved