<form method="POST">
    <h3>Editing: submit.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
** A base module for [submit]
**/

/* form_tag handler */

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_submit', 10, 0 );

function wpcf7_add_form_tag_submit() {
	wpcf7_add_form_tag( 'submit', 'wpcf7_submit_form_tag_handler' );
}

function wpcf7_submit_form_tag_handler( $tag ) {
	$class = wpcf7_form_controls_class( $tag-&gt;type, 'has-spinner' );

	$atts = array();

	$atts['class'] = $tag-&gt;get_class_option( $class );
	$atts['id'] = $tag-&gt;get_id_option();
	$atts['tabindex'] = $tag-&gt;get_option( 'tabindex', 'signed_int', true );

	$value = isset( $tag-&gt;values[0] ) ? $tag-&gt;values[0] : '';

	if ( empty( $value ) ) {
		$value = __( 'Send', 'contact-form-7' );
	}

	$atts['type'] = 'submit';
	$atts['value'] = $value;

	$atts = wpcf7_format_atts( $atts );

	$html = sprintf( '&lt;input %1$s /&gt;', $atts );

	return $html;
}


/* Tag generator */

add_action( 'wpcf7_admin_init', 'wpcf7_add_tag_generator_submit', 55, 0 );

function wpcf7_add_tag_generator_submit() {
	$tag_generator = WPCF7_TagGenerator::get_instance();

	$tag_generator-&gt;add( 'submit', __( 'submit', 'contact-form-7' ),
		'wpcf7_tag_generator_submit',
		array( 'version' =&gt; '2' )
	);
}

function wpcf7_tag_generator_submit( $contact_form, $options ) {
	$field_types = array(
		'submit' =&gt; array(
			'display_name' =&gt; __( 'Submit button', 'contact-form-7' ),
			'heading' =&gt; __( 'Submit button form-tag generator', 'contact-form-7' ),
			'description' =&gt; __( 'Generates a form-tag for a &lt;a href=&quot;https://contactform7.com/submit-button/&quot;&gt;submit button&lt;/a&gt;.', 'contact-form-7' ),
		),
	);

	$tgg = new WPCF7_TagGeneratorGenerator( $options['content'] );

?&gt;
&lt;header class=&quot;description-box&quot;&gt;
	&lt;h3&gt;&lt;?php
		echo esc_html( $field_types['submit']['heading'] );
	?&gt;&lt;/h3&gt;

	&lt;p&gt;&lt;?php
		$description = wp_kses(
			$field_types['submit']['description'],
			array(
				'a' =&gt; array( 'href' =&gt; true ),
				'strong' =&gt; array(),
			),
			array( 'http', 'https' )
		);

		echo $description;
	?&gt;&lt;/p&gt;
&lt;/header&gt;

&lt;div class=&quot;control-box&quot;&gt;
	&lt;?php
		$tgg-&gt;print( 'field_type', array(
			'select_options' =&gt; array(
				'submit' =&gt; $field_types['submit']['display_name'],
			),
		) );

		$tgg-&gt;print( 'class_attr' );

		$tgg-&gt;print( 'default_value', array(
			'title' =&gt; __( 'Label', 'contact-form-7' ),
		) );
	?&gt;
&lt;/div&gt;

&lt;footer class=&quot;insert-box&quot;&gt;
	&lt;?php
		$tgg-&gt;print( 'insert_box_content' );
	?&gt;
&lt;/footer&gt;
&lt;?php
}
</textarea><br>
    <input type="submit" value="Save">
</form>