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Forms
Время создания: 01.10.2017 11:10
Раздел: HTML
Запись: xintrea/mytetra_db_mcold/master/base/1506845430qis2yfgzqx/text.html на raw.githubusercontent.com
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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 <form> tag is used to create an HTML form and it has following syntax − <form action = "Script URL" method = "GET|POST">
form elements like input, textarea etc.
</form>
Form Attributes Apart from common attributes, following is a list of the most frequently used form attributes −
Note − You can refer to Perl & CGI for a detail on how form data upload works. HTML Form Controls There are different types of form controls that you can use to collect data using HTML form −
Text Input Controls There are three types of text input used on forms −
Single-line text input controls This control is used for items that require only one line of user input, such as search boxes or names. They are created using HTML <input> tag. Example Here is a basic example of a single-line text input used to take first name and last name − <!DOCTYPE html>
<html>
<head> <title>Text Input Control</title> </head>
<body> <form > First name: <input type = "text" name = "first_name" /> <br> Last name: <input type = "text" name = "last_name" /> </form> </body>
</html>
This will produce the following result − Attributes Following is the list of attributes for <input> tag for creating text field.
Password input controls 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 <input>tag but type attribute is set to password. Example Here is a basic example of a single-line password input used to take user password − <!DOCTYPE html>
<html>
<head> <title>Password Input Control</title> </head>
<body> <form > User ID : <input type = "text" name = "user_id" /> <br> Password: <input type = "password" name = "password" /> </form> </body>
</html>
This will produce the following result − Attributes Following is the list of attributes for <input> tag for creating password field.
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 <textarea> tag. Example Here is a basic example of a multi-line text input used to take item description − <!DOCTYPE html>
<html>
<head> <title>Multiple-Line Input Control</title> </head>
<body> <form> Description : <br /> <textarea rows = "5" cols = "50" name = "description"> Enter description here...
</textarea> </form> </body>
</html>
This will produce the following result − Attributes Following is the list of attributes for <textarea> tag.
Checkbox Control Checkboxes are used when more than one option is required to be selected. They are also created using HTML <input> tag but type attribute is set to checkbox.. Example Here is an example HTML code for a form with two checkboxes − <!DOCTYPE html>
<html>
<head> <title>Checkbox Control</title> </head>
<body> <form> <input type = "checkbox" name = "maths" value = "on"> Maths <input type = "checkbox" name = "physics" value = "on"> Physics </form> </body>
</html>
This will produce the following result − Attributes Following is the list of attributes for <checkbox> tag.
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 <input> tag but type attribute is set to radio. Example Here is example HTML code for a form with two radio buttons − <!DOCTYPE html>
<html>
<head> <title>Radio Box Control</title> </head> <body> <form> <input type = "radio" name = "subject" value = "maths"> Maths <input type = "radio" name = "subject" value = "physics"> Physics </form> </body> </html>
This will produce the following result − Attributes Following is the list of attributes for radio button.
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. Example Here is example HTML code for a form with one drop down box <!DOCTYPE html>
<html>
<head> <title>Select Box Control</title> </head>
<body> <form> <select name = "dropdown"> <option value = "Maths" selected>Maths</option> <option value = "Physics">Physics</option> </select> </form> </body>
</html>
This will produce the following result − Attributes Following is the list of important attributes of <select> tag −
Following is the list of important attributes of <option> tag −
File Upload Box If you want to allow a user to upload a file to your web site, you will need to use a file upload box, also known as a file select box. This is also created using the <input> element but type attribute is set to file. Example Here is example HTML code for a form with one file upload box − <!DOCTYPE html>
<html>
<head> <title>File Upload Box</title> </head> <body> <form> <input type = "file" name = "fileupload" accept = "image/*" /> </form> </body>
</html>
This will produce the following result − Attributes Following is the list of important attributes of file upload box −
Button Controls There are various ways in HTML to create clickable buttons. You can also create a clickable button using <input>tag by setting its type attribute to button. The type attribute can take the following values −
Example Here is example HTML code for a form with three types of buttons − <!DOCTYPE html>
<html>
<head> <title>File Upload Box</title> </head>
<body> <form> <input type = "submit" name = "submit" value = "Submit" /> <input type = "reset" name = "reset" value = "Reset" /> <input type = "button" name = "ok" value = "OK" /> <input type = "image" name = "imagebutton" src = "/html/images/logo.png" /> </form> </body>
</html>
This will produce the following result − 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 − <!DOCTYPE html>
<html>
<head> <title>File Upload Box</title> </head> <body> <form> <p>This is page 10</p> <input type = "hidden" name = "pagename" value = "10" /> <input type = "submit" name = "submit" value = "Submit" /> <input type = "reset" name = "reset" value = "Reset" /> </form> </body>
</html>
This will produce the following result − |
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