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Forms in HTML:
HTML Forms are required, when you want to collect some data from the site visitor. For example, during user registration you would like to collect information such as name, email address, credit card, etc. A form will take input from the site visitor and then will post it to a back-end application such as CGI, ASP Script or PHP script etc. The back-end application will perform required processing on the passed data based on defined business logic inside the application. There are various form elements available like text fields, textarea fields, drop-down menus, radio buttons, checkboxes, etc. The HTML **** tag is used to create an HTML form and it has following syntax โ
form elements like input, textarea etc.
Form Attributes Apart from common attributes, following is a list of the most frequently used form attributes โ Sr.No Attribute & Description 1 Action Backend script ready to process your passed data. 2 Method Method to be used to upload data. The most frequently used are GET and POST methods. 3 Target Specify the target window or frame where the result of the script will be displayed. It takes values like _blank, _self, _parent etc. 4 Enctype You can use the enctype attribute to specify how the browser encodes the data before it sends it to the server. Possible values are โ application/x-www-form-urlencoded โ This is the standard method most forms use in simple scenarios. mutlipart/form-data โ This is used when you want to upload binary data in the form of files like image, word file etc.
Definition and Usage
The tag defines a label for a , , , , , , or ** tag. ๏ท Password input controls โ This is also a single-line text input but it masks the character as soon as a user enters it. They are also created using HTMl tag. ๏ท Multi-line text input controls โ This is used when the user is required to give details that may be longer than a single sentence. Multi-line input controls are created using HTML ** tag.
Example
Here is a basic example of a single-line text input used to take first name and last name โ
Text Input Control
First name:
Example
Here is a basic example of a single-line password input used to take user password โ
Password Input Control
User ID :
Password:
This will produce the following result โ
User ID :
Password:
Attributes Following is the list of attributes for tag for creating password field. Sr.No Attribute & Description 1 Type Indicates the type of input control and for password input control it will be set to password. 2 Name Used to give a name to the control which is sent to the server to be recognized and get the value. 3 value This can be used to provide an initial value inside the control. 4 size
Allows to specify the width of the text-input control in terms of characters. 5 maxlength Allows to specify the maximum number of characters a user can enter into the text box. Multiple-Line Text Input Controls This is used when the user is required to give details that may be longer than a single sentence. Multi-line input controls are created using HTML
Following is the list of attributes for tag. Sr.No Attribute & Description 1 type Indicates the type of input control and for checkbox input control it will be set to checkbox.. 2 name Used to give a name to the control which is sent to the server to be recognized and get the value. 3 value The value that will be used if the checkbox is selected. 4 checked Set to checked if you want to select it by default. Radio Button Control Radio buttons are used when out of many options, just one option is required to be selected. They are also created using HTML tag but type attribute is set to radio.
Example
Here is example HTML code for a form with two radio buttons โ
Radio Box Control
Maths Physics
Maths Physics
Attributes Following is the list of attributes for radio button. Sr.No Attribute & Description 1 type Indicates the type of input control and for checkbox input control it will be set to radio. 2 name Used to give a name to the control which is sent to the server to be recognized and get the value. 3 value The value that will be used if the radio box is selected. 4 checked Set to checked if you want to select it by default. Select Box Control A select box, also called drop down box which provides option to list down various options in the form of drop down list, from where a user can select one or more options.
Select Box Control
File Upload Box
Attributes Following is the list of important attributes of file upload box โ Sr.No Attribute & Description 1 name Used to give a name to the control which is sent to the server to be recognized and get the value. 2 accept Specifies the types of files that the server accepts. Button Controls There are various ways in HTML to create clickable buttons. You can also create a clickable button using tag by setting its type attribute to button. The type attribute can take the following values โ Sr.No Type & Description 1 submit This creates a button that automatically submits a form. 2 reset This creates a button that automatically resets form controls to their initial values. 3 button
This creates a button that is used to trigger a client-side script when the user clicks that button. 4 image This creates a clickable button but we can use an image as background of the button.
Example
Here is example HTML code for a form with three types of buttons โ
File Upload Box
Hidden Form Controls Hidden form controls are used to hide data inside the page which later on can be pushed to the server. This control hides inside the code and does not appear on the actual page. For example, following hidden form is being used to keep current page number. When a user will click next page then the value of hidden control will be sent to the web server and there it will decide which page will be displayed next based on the passed current page.
Example
Here is example HTML code to show the usage of hidden control โ
File Upload Box
