<form method="POST">
    <h3>Editing: editor.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

class WPCF7_Editor {

	private $contact_form;
	private $panels = array();

	public function __construct( WPCF7_ContactForm $contact_form ) {
		$this-&gt;contact_form = $contact_form;
	}

	public function add_panel( $panel_id, $title, $callback ) {
		if ( wpcf7_is_name( $panel_id ) ) {
			$this-&gt;panels[$panel_id] = array(
				'title' =&gt; $title,
				'callback' =&gt; $callback,
			);
		}
	}

	public function display() {
		if ( empty( $this-&gt;panels ) ) {
			return;
		}

		$active_panel_id = trim( $_GET['active-tab'] ?? '' );

		if ( ! array_key_exists( $active_panel_id, $this-&gt;panels ) ) {
			$active_panel_id = array_key_first( $this-&gt;panels );
		}

		echo '&lt;nav&gt;';
		echo '&lt;ul id=&quot;contact-form-editor-tabs&quot;&gt;';

		foreach ( $this-&gt;panels as $panel_id =&gt; $panel ) {
			$active = $panel_id === $active_panel_id;

			echo sprintf(
				'&lt;li %1$s&gt;&lt;a %2$s&gt;%3$s&lt;/a&gt;&lt;/li&gt;',
				wpcf7_format_atts( array(
					'id' =&gt; sprintf( '%s-tab', $panel_id ),
					'class' =&gt; $active ? 'active' : null,
					'tabindex' =&gt; $active ? '0' : '-1',
					'data-panel' =&gt; $panel_id,
				) ),
				wpcf7_format_atts( array(
					'href' =&gt; sprintf( '#%s', $panel_id ),
				) ),
				esc_html( $panel['title'] )
			);
		}

		echo '&lt;/ul&gt;';
		echo '&lt;/nav&gt;';

		foreach ( $this-&gt;panels as $panel_id =&gt; $panel ) {
			$active = $panel_id === $active_panel_id;

			echo sprintf(
				'&lt;section %s&gt;',
				wpcf7_format_atts( array(
					'id' =&gt; $panel_id,
					'class' =&gt; 'contact-form-editor-panel' . ( $active ? ' active' : '' ),
				) )
			);

			if ( is_callable( $panel['callback'] ) ) {
				call_user_func( $panel['callback'], $this-&gt;contact_form );
			}

			echo '&lt;/section&gt;';
		}
	}
}

function wpcf7_editor_panel_form( $post ) {
	$desc_link = wpcf7_link(
		__( 'https://contactform7.com/editing-form-template/', 'contact-form-7' ),
		__( 'Editing form template', 'contact-form-7' ) );
	$description = __( &quot;You can edit the form template here. For details, see %s.&quot;, 'contact-form-7' );
	$description = sprintf( esc_html( $description ), $desc_link );
?&gt;

&lt;h2&gt;&lt;?php echo esc_html( __( 'Form', 'contact-form-7' ) ); ?&gt;&lt;/h2&gt;

&lt;fieldset&gt;
&lt;legend&gt;&lt;?php echo $description; ?&gt;&lt;/legend&gt;

&lt;?php
	$tag_generator = WPCF7_TagGenerator::get_instance();
	$tag_generator-&gt;print_buttons();
?&gt;

&lt;textarea id=&quot;wpcf7-form&quot; name=&quot;wpcf7-form&quot; cols=&quot;100&quot; rows=&quot;24&quot; class=&quot;large-text code&quot; data-config-field=&quot;form.body&quot;&gt;&lt;?php echo esc_textarea( $post-&gt;prop( 'form' ) ); ?&gt;&lt;/textarea&gt;
&lt;/fieldset&gt;
&lt;?php
}

function wpcf7_editor_panel_mail( $post ) {
	wpcf7_editor_box_mail( $post );

	echo '&lt;br class=&quot;clear&quot; /&gt;';

	wpcf7_editor_box_mail( $post, array(
		'id' =&gt; 'wpcf7-mail-2',
		'name' =&gt; 'mail_2',
		'title' =&gt; __( 'Mail (2)', 'contact-form-7' ),
		'use' =&gt; __( 'Use Mail (2)', 'contact-form-7' ),
	) );
}

function wpcf7_editor_box_mail( $post, $options = '' ) {
	$options = wp_parse_args( $options, array(
		'id' =&gt; 'wpcf7-mail',
		'name' =&gt; 'mail',
		'title' =&gt; __( 'Mail', 'contact-form-7' ),
		'use' =&gt; null,
	) );

	$id = esc_attr( $options['id'] );

	$mail = wp_parse_args( $post-&gt;prop( $options['name'] ), array(
		'active' =&gt; false,
		'recipient' =&gt; '',
		'sender' =&gt; '',
		'subject' =&gt; '',
		'body' =&gt; '',
		'additional_headers' =&gt; '',
		'attachments' =&gt; '',
		'use_html' =&gt; false,
		'exclude_blank' =&gt; false,
	) );

?&gt;
&lt;div class=&quot;contact-form-editor-box-mail&quot; id=&quot;&lt;?php echo esc_attr( $id ); ?&gt;&quot;&gt;
&lt;h2&gt;&lt;?php echo esc_html( $options['title'] ); ?&gt;&lt;/h2&gt;

&lt;?php
	if ( ! empty( $options['use'] ) ) {
		echo sprintf(
			'&lt;label %1$s&gt;&lt;input %2$s /&gt; %3$s&lt;/label&gt;',
			wpcf7_format_atts( array(
				'for' =&gt; sprintf( '%s-active', $id ),
			) ),
			wpcf7_format_atts( array(
				'type' =&gt; 'checkbox',
				'id' =&gt; sprintf( '%s-active', $id ),
				'name' =&gt; sprintf( '%s[active]', $id ),
				'data-config-field' =&gt; '',
				'data-toggle' =&gt; sprintf( '%s-fieldset', $id ),
				'value' =&gt; '1',
				'checked' =&gt; $mail['active'],
			) ),
			esc_html( $options['use'] )
		);

		echo sprintf(
			'&lt;p class=&quot;description&quot;&gt;%s&lt;/p&gt;',
			esc_html( __( &quot;Mail (2) is an additional mail template often used as an autoresponder.&quot;, 'contact-form-7' ) )
		);
	}
?&gt;

&lt;fieldset id=&quot;&lt;?php echo esc_attr( sprintf( '%s-fieldset', $id ) ); ?&gt;&quot;&gt;
&lt;legend&gt;
&lt;?php
	$desc_link = wpcf7_link(
		__( 'https://contactform7.com/setting-up-mail/', 'contact-form-7' ),
		__( 'Setting up mail', 'contact-form-7' ) );
	$description = __( &quot;You can edit the mail template here. For details, see %s.&quot;, 'contact-form-7' );
	$description = sprintf( esc_html( $description ), $desc_link );
	echo $description;
	echo '&lt;br /&gt;';

	echo esc_html( __( &quot;In the following fields, you can use these mail-tags:&quot;,
		'contact-form-7' ) );
	echo '&lt;br /&gt;';
	$post-&gt;suggest_mail_tags( $options['name'] );
?&gt;
&lt;/legend&gt;
&lt;table class=&quot;form-table&quot;&gt;
&lt;tbody&gt;
	&lt;tr&gt;
	&lt;th scope=&quot;row&quot;&gt;
		&lt;label for=&quot;&lt;?php echo $id; ?&gt;-recipient&quot;&gt;&lt;?php echo esc_html( __( 'To', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;
	&lt;/th&gt;
	&lt;td&gt;
		&lt;input type=&quot;text&quot; id=&quot;&lt;?php echo $id; ?&gt;-recipient&quot; name=&quot;&lt;?php echo $id; ?&gt;[recipient]&quot; class=&quot;large-text code&quot; size=&quot;70&quot; value=&quot;&lt;?php echo esc_attr( $mail['recipient'] ); ?&gt;&quot; data-config-field=&quot;&lt;?php echo sprintf( '%s.recipient', esc_attr( $options['name'] ) ); ?&gt;&quot; /&gt;
	&lt;/td&gt;
	&lt;/tr&gt;

	&lt;tr&gt;
	&lt;th scope=&quot;row&quot;&gt;
		&lt;label for=&quot;&lt;?php echo $id; ?&gt;-sender&quot;&gt;&lt;?php echo esc_html( __( 'From', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;
	&lt;/th&gt;
	&lt;td&gt;
		&lt;input type=&quot;text&quot; id=&quot;&lt;?php echo $id; ?&gt;-sender&quot; name=&quot;&lt;?php echo $id; ?&gt;[sender]&quot; class=&quot;large-text code&quot; size=&quot;70&quot; value=&quot;&lt;?php echo esc_attr( $mail['sender'] ); ?&gt;&quot; data-config-field=&quot;&lt;?php echo sprintf( '%s.sender', esc_attr( $options['name'] ) ); ?&gt;&quot; /&gt;
	&lt;/td&gt;
	&lt;/tr&gt;

	&lt;tr&gt;
	&lt;th scope=&quot;row&quot;&gt;
		&lt;label for=&quot;&lt;?php echo $id; ?&gt;-subject&quot;&gt;&lt;?php echo esc_html( __( 'Subject', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;
	&lt;/th&gt;
	&lt;td&gt;
		&lt;input type=&quot;text&quot; id=&quot;&lt;?php echo $id; ?&gt;-subject&quot; name=&quot;&lt;?php echo $id; ?&gt;[subject]&quot; class=&quot;large-text code&quot; size=&quot;70&quot; value=&quot;&lt;?php echo esc_attr( $mail['subject'] ); ?&gt;&quot; data-config-field=&quot;&lt;?php echo sprintf( '%s.subject', esc_attr( $options['name'] ) ); ?&gt;&quot; /&gt;
	&lt;/td&gt;
	&lt;/tr&gt;

	&lt;tr&gt;
	&lt;th scope=&quot;row&quot;&gt;
		&lt;label for=&quot;&lt;?php echo $id; ?&gt;-additional-headers&quot;&gt;&lt;?php echo esc_html( __( 'Additional headers', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;
	&lt;/th&gt;
	&lt;td&gt;
		&lt;textarea id=&quot;&lt;?php echo $id; ?&gt;-additional-headers&quot; name=&quot;&lt;?php echo $id; ?&gt;[additional_headers]&quot; cols=&quot;100&quot; rows=&quot;4&quot; class=&quot;large-text code&quot; data-config-field=&quot;&lt;?php echo sprintf( '%s.additional_headers', esc_attr( $options['name'] ) ); ?&gt;&quot;&gt;&lt;?php echo esc_textarea( $mail['additional_headers'] ); ?&gt;&lt;/textarea&gt;
	&lt;/td&gt;
	&lt;/tr&gt;

	&lt;tr&gt;
	&lt;th scope=&quot;row&quot;&gt;
		&lt;label for=&quot;&lt;?php echo $id; ?&gt;-body&quot;&gt;&lt;?php echo esc_html( __( 'Message body', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;
	&lt;/th&gt;
	&lt;td&gt;
		&lt;textarea id=&quot;&lt;?php echo $id; ?&gt;-body&quot; name=&quot;&lt;?php echo $id; ?&gt;[body]&quot; cols=&quot;100&quot; rows=&quot;18&quot; class=&quot;large-text code&quot; data-config-field=&quot;&lt;?php echo sprintf( '%s.body', esc_attr( $options['name'] ) ); ?&gt;&quot;&gt;&lt;?php echo esc_textarea( $mail['body'] ); ?&gt;&lt;/textarea&gt;

		&lt;p&gt;&lt;label for=&quot;&lt;?php echo $id; ?&gt;-exclude-blank&quot;&gt;&lt;input type=&quot;checkbox&quot; id=&quot;&lt;?php echo $id; ?&gt;-exclude-blank&quot; name=&quot;&lt;?php echo $id; ?&gt;[exclude_blank]&quot; value=&quot;1&quot;&lt;?php echo ( ! empty( $mail['exclude_blank'] ) ) ? ' checked=&quot;checked&quot;' : ''; ?&gt; /&gt; &lt;?php echo esc_html( __( 'Exclude lines with blank mail-tags from output', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;&lt;/p&gt;

		&lt;p&gt;&lt;label for=&quot;&lt;?php echo $id; ?&gt;-use-html&quot;&gt;&lt;input type=&quot;checkbox&quot; id=&quot;&lt;?php echo $id; ?&gt;-use-html&quot; name=&quot;&lt;?php echo $id; ?&gt;[use_html]&quot; value=&quot;1&quot;&lt;?php echo ( $mail['use_html'] ) ? ' checked=&quot;checked&quot;' : ''; ?&gt; /&gt; &lt;?php echo esc_html( __( 'Use HTML content type', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;&lt;/p&gt;
	&lt;/td&gt;
	&lt;/tr&gt;

	&lt;tr&gt;
	&lt;th scope=&quot;row&quot;&gt;
		&lt;label for=&quot;&lt;?php echo $id; ?&gt;-attachments&quot;&gt;&lt;?php echo esc_html( __( 'File attachments', 'contact-form-7' ) ); ?&gt;&lt;/label&gt;
	&lt;/th&gt;
	&lt;td&gt;
		&lt;textarea id=&quot;&lt;?php echo $id; ?&gt;-attachments&quot; name=&quot;&lt;?php echo $id; ?&gt;[attachments]&quot; cols=&quot;100&quot; rows=&quot;4&quot; class=&quot;large-text code&quot; data-config-field=&quot;&lt;?php echo sprintf( '%s.attachments', esc_attr( $options['name'] ) ); ?&gt;&quot;&gt;&lt;?php echo esc_textarea( $mail['attachments'] ); ?&gt;&lt;/textarea&gt;
	&lt;/td&gt;
	&lt;/tr&gt;
&lt;/tbody&gt;
&lt;/table&gt;
&lt;/fieldset&gt;
&lt;/div&gt;
&lt;?php
}

function wpcf7_editor_panel_messages( $post ) {
	$desc_link = wpcf7_link(
		__( 'https://contactform7.com/editing-messages/', 'contact-form-7' ),
		__( 'Editing messages', 'contact-form-7' ) );
	$description = __( &quot;You can edit messages used in various situations here. For details, see %s.&quot;, 'contact-form-7' );
	$description = sprintf( esc_html( $description ), $desc_link );

	$messages = wpcf7_messages();

	if ( isset( $messages['captcha_not_match'] )
	and ! wpcf7_use_really_simple_captcha() ) {
		unset( $messages['captcha_not_match'] );
	}

?&gt;
&lt;h2&gt;&lt;?php echo esc_html( __( 'Messages', 'contact-form-7' ) ); ?&gt;&lt;/h2&gt;
&lt;fieldset&gt;
&lt;legend&gt;&lt;?php echo $description; ?&gt;&lt;/legend&gt;
&lt;?php

	foreach ( $messages as $key =&gt; $arr ) {
		$field_id = sprintf( 'wpcf7-message-%s', strtr( $key, '_', '-' ) );
		$field_name = sprintf( 'wpcf7-messages[%s]', $key );

?&gt;
&lt;p class=&quot;description&quot;&gt;
&lt;label for=&quot;&lt;?php echo $field_id; ?&gt;&quot;&gt;&lt;?php echo esc_html( $arr['description'] ); ?&gt;&lt;br /&gt;
&lt;input type=&quot;text&quot; id=&quot;&lt;?php echo $field_id; ?&gt;&quot; name=&quot;&lt;?php echo $field_name; ?&gt;&quot; class=&quot;large-text&quot; size=&quot;70&quot; value=&quot;&lt;?php echo esc_attr( $post-&gt;message( $key, false ) ); ?&gt;&quot; data-config-field=&quot;&lt;?php echo sprintf( 'messages.%s', esc_attr( $key ) ); ?&gt;&quot; /&gt;
&lt;/label&gt;
&lt;/p&gt;
&lt;?php
	}
?&gt;
&lt;/fieldset&gt;
&lt;?php
}

function wpcf7_editor_panel_additional_settings( $post ) {
	$desc_link = wpcf7_link(
		__( 'https://contactform7.com/additional-settings/', 'contact-form-7' ),
		__( 'Additional settings', 'contact-form-7' ) );
	$description = __( &quot;You can add customization code snippets here. For details, see %s.&quot;, 'contact-form-7' );
	$description = sprintf( esc_html( $description ), $desc_link );

?&gt;
&lt;h2&gt;&lt;?php echo esc_html( __( 'Additional Settings', 'contact-form-7' ) ); ?&gt;&lt;/h2&gt;
&lt;fieldset&gt;
&lt;legend&gt;&lt;?php echo $description; ?&gt;&lt;/legend&gt;
&lt;textarea id=&quot;wpcf7-additional-settings&quot; name=&quot;wpcf7-additional-settings&quot; cols=&quot;100&quot; rows=&quot;8&quot; class=&quot;large-text&quot; data-config-field=&quot;additional_settings.body&quot;&gt;&lt;?php echo esc_textarea( $post-&gt;prop( 'additional_settings' ) ); ?&gt;&lt;/textarea&gt;
&lt;/fieldset&gt;
&lt;?php
}
</textarea><br>
    <input type="submit" value="Save">
</form>