PHP/JS integration problems

Junior WebHelper Joined: 09 May 2002 Posts: 15

i declare two text boxes text1 and text2 and use them for form validation in JS, in a .php file. however, on the next page when i try to use text1 and text2 in php, it seems taht since i used them in javascript, i cannot use them in the next page which is in php. why cant i use the same variables for JS and PHP? if i can, why am i getting errors?

Team Member Joined: 06 Jan 2002 Posts: 2564

Javascript is CLIENT side, and PHP is SERVER side. The two do not interact with each other unless special measures are taken.

Junior WebHelper Joined: 09 May 2002 Posts: 15

unless u know a way to do form validation with php, how do u do that?

Posted: Fri May 10, 2002 9:32 pm (21 years, 11 months ago)

Depends what you want to validate.

If its just that the field has been filled in you can use, something like:

Code:

if(empty($field)) {
//field is empty, give error message
} else {
//process form e.g. email it or add it to db
}

You can also use regular expresions to check the field contains certain data e.g that a phone number contains numbers.

Junior WebHelper Joined: 09 May 2002 Posts: 15

we are not all php mongers here. i am a mere amature. that long chain of slashes and letters and numbers have no meaning to me. if ur gonna post something on a help board, u have to newbify it

Junior WebHelper Joined: 10 Oct 2002 Posts: 49

is an example of a regular expression. I realize now that this chain of characters may look a bit overwhelming to newbies but once you understand how to compose one, you will find that it can be helpful whether you choose to code in PHP, Perl or JavaScript. In this particular case, the regular expression does as I describe in the comment above it. If you need to learn how to create or interpret a regular expression, I suggest that you may wish to review Chapter 8, "Regular Expressions" IN: PHP for the World Wide Web by Larry Ullman (Visual Quickstart Guide), Peachpit Press, 2001.

Team Member Joined: 09 Jan 2002 Posts: 147 Location: UK

metsfan922 wrote:

we are not all php mongers here. i am a mere amature. that long chain of slashes and letters and numbers have no meaning to me. if ur gonna post something on a help board, u have to newbify it

If you want to learn you have to make some effort. We are here to help you, not to teach you. Buy yourself a book and spend time teaching yourself. Then ask questions when you get stuck.

That chain of slashes and letters is a regular expression. If you want to really understand them then buy the book "Mastering Regular Expressions" which tells you absolutely everything you need to know.

Team Member Joined: 06 Jan 2002 Posts: 2564

Or read the article mentioned here:

http://www.4webhelp.net/forums/viewtopic.php?p=4339#4339