2. HTML forms are an essential component of web
development, enabling interaction between users
and websites. A form consists of various input
fields, such as text fields, checkboxes, radio
buttons, dropdown menus, and buttons, which
allow users to input data and submit it to a server
for processing.
3. Form handling in PHP involves capturing user
input from HTML forms and processing it on the
server side. Form handling typically involves
retrieving the submitted data, performing any
necessary validation or sanitization, and then
processing it further (e.g., saving to a database,
sending emails, etc.).
4. FEATURE GET POST
Data Transmission Data is sent via URL parameters
Data is sent in the body of the
request
Visibility Data is visible in the URL Data is not visible in the URL
Data Length Limit
Limited by URL length (typically
2048 characters)
Limited by server configuration or
PHP settings (typically larger than
GET)
Security
Less secure for sensitive
information, as data is visible in
URL and can be bookmarked or
cached
More secure for sensitive
information, as data is not visible
in URL and is not cached or
bookmarked
Idempotent
Should be idempotent (i.e.,
multiple identical requests should
have the same effect as a single
request)
May or may not be idempotent,
typically used for operations that
change state (e.g., submitting a
form)
5. Form processing refers to the actions taken with the
data submitted through a form. This includes tasks
such as validating the input, storing it in a database,
sending it via email, or performing any other
necessary operations based on the form's purpose.
In PHP, form processing is typically done in the same
PHP script that handles form submission.
6. Form validation is the process of ensuring that
the data submitted through a form meets certain
requirements or constraints. This can include
checking for required fields, validating email
addresses, verifying the format of dates etc.
7. TEXT
This creates a single-line text
input field where users can
type alphanumeric
characters.
SYNTAX:- <input type =
“text” name=“Name”>
This creates a password input
field where the entered
characters are masked (usually
as asterisks or dots).
SYNTAX:- <input type
=“password” name=“password”>
This creates a set of radio buttons where
users can select one option from multiple
choices.
SYNTAX:- <input type="radio"
name="gender" value="male"> Male
<input type="radio" name="gender"
value="female"> Female
This creates checkboxes where
users can select multiple options.
SYNTAX:- <input
type="checkbox"
name="hobbies[]"
value="reading"> Reading
<input type="checkbox"
name="hobbies[]"
value="cooking"> Cooking
PASSWORD RADIO CHECKBOX
TEXTAREA
This creates a multi-line text input
field where users can enter longer
text entries, such as comments or
messages.
SYNTAX:- <input type = “TextArea”
name=“Message”>
DROPDOWN
This creates a dropdown menu where users can
select one option from a list.
SYNTAX:- <select name="country">
<option value="usa">United States</option>
<option value="uk">United Kingdom</option>
<option value="canada">Canada</option>
</select>
HIDDEN
This creates an invisible input field
that's not displayed to the user but
can be submitted with the form data.
SYNTAX:- <input type="hidden"
name="user_id" value="123">
