When the user click on the link below the form will submit, but my controller unable to get the value. Is there a way to fix this issue? Thanks.
<li role="presentation"><a role="menuitem" tabindex="-1" href="javascript:{}" onclick="this.form.submit()" name="action" value="auto">CSS</a></li>
Only <input>, <option> and <button> elements will pass a value attribute in a form submission. Your best bet may be to use a <button> instead of an <a>, or put the value in a hidden form element (either would need to be inside the <form> tag):
<input type="hidden" name="action" value="auto">
Hard to give much more help without having any context for your code snippet.
Another idea can be, simply apply onclick jquery function on that link. Whenever anyone click on that, use Ajax to complete your work in PHP part.
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