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XHTML Tutorial - Values Submitted on Checkbox Fields

(Continued from previous topic...)

What Are the Values Submitted on Checkbox Fields?

A "checkbox" input field does not allow viewers to enter any input values directly. If a form is submitted, "checkbox" input fields will be submitted with values based on the following rules:

• If a "checkbox" is not checked, no value will be submitted for this checkbox.
• If a "checkbox" is checked and no value specified in the "value" attribute, "on" will be submitted as the value.
• If a "checkbox" is checked and a value specified in the "value" attribute, the specified value will be submitted as the value.

If you use the previous tutorial example, you can test the following cases:

1. If you check all the checkboxes and click the submit button, you will get the following values submitted:

http://localhost/submit?check1=on&check2=css&check3=php

2. If you check only the first and third checkboxes and click the submit button, you will get the following values submitted:

http://localhost/submit?check1=on&check3=php

3. If you check only the third checkboxes and click the submit button, you will get the following values submitted:

http://localhost/submit?check3=php

(Continued on next topic...)

1. What Is a "form" Tag/Element?
2. What Are the Attributes of a "form" Element?
3. What Is an "input" Tag/Element?
4. How Many Input Types Are Supported by "input" Elements?
5. How To Use "text" Input Fields?
6. How To Use "password" Input Fields?
7. How To Use "checkbox" Input Fields?
8. What Are the Values Submitted on Checkbox Fields?
9. How To Use "radio" Input Fields?
10. What Are the Values Submitted on Radio Button Fields?
11. How To Use "submit" Input/Action Fields?
12. What Are the Values Submitted on Submit Button Fields?
13. How To Use "reset" Input/Action Fields?
14. How To Use "file" Input Fields?
15. How To Use "hidden" Input Fields?
16. How To Use "image" Input Fields?
17. What Are the Values Submitted on Image Button Fields?
18. How To Use "button" Input Fields?
19. What Is a "textarea" Tag/Element?
20. What Are the Attributes of a "textarea" Element?
21. What Is a "select" Tag/Element?
22. What Is an "option" Tag/Element?
23. What Is a "label" Tag/Element?
24. Can Two Forms Be Nested?
25. Do Broswers Support Multiple Forms?