html input multiple values
<form action="/action_page.php">
<label for="files">Select files:</label>
<input type="file" id="files" name="files" multiple><br><br>
<input type="submit">
</form>
Definition and Usage
The multiple attribute is a boolean attribute.
When present, it specifies that the user is allowed to enter more than one value in the <input> element.
Note: The multiple attribute works with the following input types: email, and file.
Tip: For <input type="file">: To select multiple files, hold down the CTRL or SHIFT key while selecting.
Tip: For <input type="email">: Separate each email with a comma, like: [email protected], [email protected], [email protected] in the email field.