The form tag is used to create a form that allows users to enter data and submit it to server-side processing. Attributes include action (handler URL), method (submission method), name (form name), target (submission target), enctype (data encoding method). Form elements include text boxes, drop-down lists, text areas, buttons, etc. Submitting the form will send the data to the server via the specified method and URL.
Usage of form tag in HTML
What is form tag?
The form tag is used to create a form that allows users to enter data and sends the data to server-side processing when the form is submitted.
Attributes of the form tag
- action: Specifies the URL of the server-side handler that sends data after the form is submitted.
- method: Specify the method to submit data to the server (usually GET or POST).
- name: Specify a name for the form so it can be referenced in the HTML page.
- target: Specify the target after the form is submitted (_self by default).
- enctype: Specifies how to encode form data (application/x-www-form-urlencoded by default).
Form elements
Forms can collect user input through various form elements, including:
- input: Text box, password box, check box, radio button, etc.
- select: Drop-down list.
- textarea: Multi-line text input area.
- button: Submit button, reset button, etc.
Form submission
When the user clicks the submit button in the form, the form data will be submitted to the server through the specified method and action.
Example
Create a simple form to collect users’ names:
<form action="process_form.php" method="post"> <label for="name">姓名：</label> <input type="text" id="name" name="name"> <input type="submit" value="提交"> </form>
Notes
- Always validate user input to prevent malicious submissions.
- Explicitly specify the method and action attributes so that the form works properly.
- Use the
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