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AJAX - PHP validation [message #39114]

Sun, 30 September 2007 06:38

esm2002

Messages: 339
Registered: May 2002
Location: Atlanta Georgia

Karma: 0

Senior Member

I have a page where I use AJAX to call a PHP file which validates a couple of fields in a form. I use onblur to call a JS function which is a AJAX call a PHP file which checks the field for validity.

I have read a little about using JS to validate client-side (folks say this is a thing to do) and PHP to validate server-side (folks say this is a must).

So where does AJAX fit into the validation of form data...???

I have read where JS is useless if the surfer has it turned off. But you cannot really use my site if JS is turned off.

Comments???

.

Gene
"The older I get, the more I admire competence, just simple competence in any field from adultery to zoology."

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Re: AJAX - PHP validation [message #166525 is a reply to message #39114]

Sat, 07 January 2012 05:30

naudefj

Messages: 3775
Registered: December 2004

Karma: 28

Senior Member
Administrator
Core Developer

AJAX can be used to validate data interactively as users type. You still need to re-validate everything when the form is posted, as AJAX is JS based and can be deactivated and bots can post data without executing the JS.

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Re: AJAX - PHP validation [message #166645 is a reply to message #39114]

Sat, 04 February 2012 09:24

NeXuS
Messages: 121
Registered: July 2010
Location: South Korea

Karma: 5

Senior Member
Contributing Core Developer

What you can use AJAX for is:

local verification
remote verification

Local verification: you check things like "password1 == password2"
Remote verification: you call a script on the server (PHP,Perl,etc.) which tells you if a parameter is valid (e.g. usernamve available)

As already stated you will anyway to redo the checks server side.

[Updated on: Sat, 04 February 2012 09:25]

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