The <input> tags does not allow/support many CSS properties, so I want to change it to <button>.

How can I get that button and apply a filter to it?

  • Just curious, what CSS properties do you have in mind?
    – birgire
    Oct 23 '15 at 8:15
  • Generally pseudos like :before are not working.
    – thednp
    Oct 23 '15 at 8:29

You should be able to change the HTML structure for the comment form's submit, with the comment_form_defaults filter.

Here's an untested example:

add_filter( 'comment_form_defaults', function( $defaults )
    // Edit this to your needs:
    $button = '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />';

    // Override the default submit button:
    $defaults['submit_button'] = $button;

    return $defaults;
} );

where you adjust the $button to your needs.

There's also the comment_form_submit_button filter:

add_filter( 'comment_form_submit_button', function( $submit_button, $args )
    // Override the submit button HTML:
    $button = '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />';

    return sprintf(
        esc_attr( $args['name_submit'] ),
        esc_attr( $args['id_submit'] ),
        esc_attr( $args['class_submit'] ),
        esc_attr( $args['label_submit'] )

}, 10, 2 );

It should even be possible with the comment_form_submit_field filter, but it contains hidden fields as well, so it might not be as helpful as the other filters.

  • Thanks so much, the first method works, please update the second method add_filter( 'comment_form_submit_button', function( $submit_button, $args ){} I would like to use this one. The $submit_button = '<input name="%1$s" type="submit" id="%2$s" class="%3$s" value="%4$s" />'; copied to the second method isn't working.
    – thednp
    Oct 23 '15 at 8:20
  • Great. I updated the example with the comment_form_submit_button filter. @thednp
    – birgire
    Oct 23 '15 at 10:23

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