Form field validation

Anon

Hi,
I've a form in my php page.I want to check whether the field(s) are null/notnull,check/unchecked etc.
I tried using isset() and count($checkboxname),but,I'm not getting the result.I don't want to use javascript.When I click the submit button,the form is posted to another php page.I got examles,when the form is posted to the same page.But,not to different page.
Any ideas/suggetsions will be greatly helpful for me.Thanks in advance.

Anon

you can simply use if clause to check whether the field is null or not. e.g.

if ($name == '') { echo 'its empty'; }

thats what i normally use... cant think of any other solution.

good luck...

Anon

How can you check if a field is number and /or email?
thanks.

Anon

gettype() will return the type of the variable/object. it will return the following values:

"integer"
"double"
"string"
"array"
"object"
"class"
"unknown type"

so you can use it like:

if(gettype($user_input) == 'integer') {
$age = $user_input;
}

good luck,
Daarius...

Anon

Daarius,
For email, I have seen that people tried to write functions that break downs the strind, looks for the @ and so on.
I know that I can use javascript validation with email in PHP without any problems. Most WYSIWYG page makers have that built in.

Is there a built in function to check email?

Anon

using isset on a posted value will always return true even if its empty. use the empty() function to test
you could loop though the submitted values and form a string containing the names of the empty fields, then redirect back to the form page but with the error string passed in the url.
in your form page do a check to see if $errors isset and print it out with a sorry but the following required fields are missing.
only problem i can think of now is that the browser will make a new request to server and not use the cached copy so all values entered will be lost(i hope its not a large form).

warren

Anon

there isnt any built in email checker function in PHP. but i know there are lots of free codes that you can use to validate the email address.

check the 'Shared code lib' link here on this site. i am sure it has it.