Detailed introduction to HTML forms-HTML Tutorial-php.cn

Detailed introduction to HTML forms

Y2J

Release： 2017-05-20 10:20:32

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HTML forms are used to collect different types of user input. HTML5 Input, with multiple new form input types, provides better input control and validation.

Form

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A form is an area that contains form elements.

Form elements are elements that allow users to enter information in a form (such as text fields, drop-down lists, radio buttons, check boxes, etc.).

Forms are defined using the form tag (

##Input type

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HTML5 has several new form input types. These new features provide better input control and validation.

1.Input type - email

email type is used for input fields that should contain e-mail addresses. When submitting the form, the value of the

email field will automatically be verified.

2.Input type - url

The url type is used for input fields that should contain URL addresses. When submitting the form, the value of the url field is automatically verified.

3.Input type - number

number type is used for input fields that should contain numerical values. You can also set limits on the numbers that are accepted:

4.Input type - range

range type is used when a certain Input field for numeric values within the range.

Range types are displayed as sliders.

You can also set limits on the numbers accepted:

5.Input Type - Date Pickers (Data Checker)

HTML5 has several new input types for selecting dates and times:

date - selects day, month, year

month - selects month, year

week - Select week and year

time - Select time (hours and minutes)

datetime - Select time, day, month, year (UTC time)

datetime-local - Select time, day, month, year (local time)

6.Input type - search

search type is used

Search domains, such as site search or Google search.

The search field appears as a regular text field.

Input

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The form tag used in most cases is the input tag (). The input type is defined by the type

attribute (type). Most commonly used input types are as follows:

Text field

Text is used when users type letters, numbers, etc. in a form fields (text fields).

<form>
First name: <input type="text" name="firstname" /><br />
Last name: <input type="text" name="lastname" />
</form>

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The browser displays as follows:

Detailed introduction to HTML forms

#Note that the form itself is not visible. Also, in most browsers, the default width of a text field is 20 characters.

Radio buttons are used when the user selects one of several given choices.

<form>
<input type="radio" name="sex" value="male"> Male
<input type="radio" name="sex" value="female"> Female
</form>

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The browser displays the following:

Male
Female

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Note that you can only select one of them.

As shown:

Detailed introduction to HTML forms

Check box

When the user needs to select from a number of given choices When selecting one or several options, checkboxes are used.

<form>
<input type="checkbox" name="bike" />I have a bike
<br />
<input type="checkbox" name="car" />I have a car
</form>

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The browser displays as follows:

I have a bike
I have a car

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Other components

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Confirm

Button

When the user clicks the confirm button (submit), the content of the form will be transferred to another file. [1]

Action attribute

The action attribute (

action) of the form defines the file name of the destination file. The file defined by the action attribute usually performs related processing on the input data received.

<form name="input" action="html_form_action.asp" method="get">
Username: <input type="text" name="user">
<input type="submit" value="Submit">
</form>

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The browser displays as follows:

Username:

As shown below:

Detailed introduction to HTML forms

If you are in the above text Type a few letters into the box and click the confirm button, then the input data will be sent to the page named "html_form_action.asp". That page will display the results entered.

Form Tag

Detailed introduction to HTML forms

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