<form method="POST">
    <h3>Editing: stripe.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
/**
 * Stripe module main file
 *
 * @link https://contactform7.com/stripe-integration/
 */

wpcf7_include_module_file( 'stripe/service.php' );
wpcf7_include_module_file( 'stripe/api.php' );


add_action(
	'wpcf7_init',
	'wpcf7_stripe_register_service',
	50, 0
);

/**
 * Registers the Stripe service.
 */
function wpcf7_stripe_register_service() {
	$integration = WPCF7_Integration::get_instance();

	$integration-&gt;add_service( 'stripe',
		WPCF7_Stripe::get_instance()
	);
}


add_action(
	'wpcf7_enqueue_scripts',
	'wpcf7_stripe_enqueue_scripts',
	10, 0
);

/**
 * Enqueues scripts and styles for the Stripe module.
 */
function wpcf7_stripe_enqueue_scripts() {
	$service = WPCF7_Stripe::get_instance();

	if ( ! $service-&gt;is_active() ) {
		return;
	}

	wp_enqueue_style( 'wpcf7-stripe',
		wpcf7_plugin_url( 'modules/stripe/style.css' ),
		array(), WPCF7_VERSION, 'all'
	);

	wp_register_script(
		'stripe',
		'https://js.stripe.com/v3/',
		array(),
		null
	);

	$assets = include(
		wpcf7_plugin_path( 'modules/stripe/index.asset.php' )
	);

	$assets = wp_parse_args( $assets, array(
		'dependencies' =&gt; array(),
		'version' =&gt; WPCF7_VERSION,
	) );

	wp_enqueue_script(
		'wpcf7-stripe',
		wpcf7_plugin_url( 'modules/stripe/index.js' ),
		array_merge(
			$assets['dependencies'],
			array(
				'wp-polyfill',
				'contact-form-7',
				'stripe',
			)
		),
		$assets['version'],
		array( 'in_footer' =&gt; true )
	);

	$api_keys = $service-&gt;get_api_keys();

	if ( $api_keys['publishable'] ) {
		wp_add_inline_script( 'wpcf7-stripe',
			sprintf(
				'var wpcf7_stripe = %s;',
				wp_json_encode( array(
					'publishable_key' =&gt; $api_keys['publishable'],
				), JSON_PRETTY_PRINT )
			),
			'before'
		);
	}
}


add_filter(
	'wpcf7_skip_spam_check',
	'wpcf7_stripe_skip_spam_check',
	10, 2
);

/**
 * Skips the spam check if it is not necessary.
 *
 * @return bool True if the spam check is not necessary.
 */
function wpcf7_stripe_skip_spam_check( $skip_spam_check, $submission ) {
	$service = WPCF7_Stripe::get_instance();

	if ( ! $service-&gt;is_active() ) {
		return $skip_spam_check;
	}

	if ( ! empty( $_POST['_wpcf7_stripe_payment_intent'] ) ) {
		$pi_id = trim( $_POST['_wpcf7_stripe_payment_intent'] );
		$payment_intent = $service-&gt;api()-&gt;retrieve_payment_intent( $pi_id );

		if ( isset( $payment_intent['status'] )
		and ( 'succeeded' === $payment_intent['status'] ) ) {
			$submission-&gt;push( 'payment_intent', $pi_id );
		}
	}

	if ( ! empty( $submission-&gt;pull( 'payment_intent' ) )
	and $submission-&gt;verify_posted_data_hash() ) {
		$skip_spam_check = true;
	}

	return $skip_spam_check;
}


add_action(
	'wpcf7_before_send_mail',
	'wpcf7_stripe_before_send_mail',
	10, 3
);

/**
 * Creates Stripe's Payment Intent.
 */
function wpcf7_stripe_before_send_mail( $contact_form, &amp;$abort, $submission ) {
	$service = WPCF7_Stripe::get_instance();

	if ( ! $service-&gt;is_active() ) {
		return;
	}

	$tags = $contact_form-&gt;scan_form_tags( array( 'type' =&gt; 'stripe' ) );

	if ( ! $tags ) {
		return;
	}

	if ( ! empty( $submission-&gt;pull( 'payment_intent' ) ) ) {
		return;
	}

	$tag = $tags[0];
	$amount = $tag-&gt;get_option( 'amount', 'int', true );
	$currency = $tag-&gt;get_option( 'currency', '[a-zA-Z]{3}', true );

	$payment_intent_params = apply_filters(
		'wpcf7_stripe_payment_intent_parameters',
		array(
			'amount' =&gt; $amount ? absint( $amount ) : null,
			'currency' =&gt; $currency ? strtolower( $currency ) : null,
			'receipt_email' =&gt; $submission-&gt;get_posted_data( 'your-email' ),
		)
	);

	$payment_intent = $service-&gt;api()-&gt;create_payment_intent(
		$payment_intent_params
	);

	if ( $payment_intent ) {
		$submission-&gt;add_result_props( array(
			'stripe' =&gt; array(
				'payment_intent' =&gt; array(
					'id' =&gt; $payment_intent['id'],
					'client_secret' =&gt; $payment_intent['client_secret'],
				),
			),
		) );

		$submission-&gt;set_status( 'payment_required' );

		$submission-&gt;set_response(
			__( &quot;Payment is required. Please pay by credit card.&quot;, 'contact-form-7' )
		);
	}

	$abort = true;
}


/**
 * Returns payment link URL.
 *
 * @param string $pi_id Payment Intent ID.
 * @return string The URL.
 */
function wpcf7_stripe_get_payment_link( $pi_id ) {
	return sprintf(
		'https://dashboard.stripe.com/payments/%s',
		urlencode( $pi_id )
	);
}


add_filter(
	'wpcf7_special_mail_tags',
	'wpcf7_stripe_smt',
	10, 4
);

/**
 * Registers the [_stripe_payment_link] special mail-tag.
 */
function wpcf7_stripe_smt( $output, $tag_name, $html, $mail_tag = null ) {
	if ( '_stripe_payment_link' === $tag_name ) {
		$submission = WPCF7_Submission::get_instance();

		$pi_id = $submission-&gt;pull( 'payment_intent' );

		if ( ! empty( $pi_id ) ) {
			$output = wpcf7_stripe_get_payment_link( $pi_id );
		}
	}

	return $output;
}


add_filter(
	'wpcf7_flamingo_inbound_message_parameters',
	'wpcf7_stripe_add_flamingo_inbound_message_params',
	10, 1
);

/**
 * Adds Stripe-related meta data to Flamingo Inbound Message parameters.
 */
function wpcf7_stripe_add_flamingo_inbound_message_params( $args ) {
	$submission = WPCF7_Submission::get_instance();

	$pi_id = $submission-&gt;pull( 'payment_intent' );

	if ( empty( $pi_id ) ) {
		return $args;
	}

	$pi_link = wpcf7_stripe_get_payment_link( $pi_id );

	$meta = (array) $args['meta'];

	$meta['stripe_payment_link'] = $pi_link;

	$args['meta'] = $meta;

	return $args;
}


add_action(
	'wpcf7_init',
	'wpcf7_add_form_tag_stripe',
	10, 0
);

/**
 * Registers the stripe form-tag handler.
 */
function wpcf7_add_form_tag_stripe() {
	wpcf7_add_form_tag(
		'stripe',
		'wpcf7_stripe_form_tag_handler',
		array(
			'display-block' =&gt; true,
			'singular' =&gt; true,
		)
	);
}


/**
 * Defines the stripe form-tag handler.
 *
 * @return string HTML content that replaces a stripe form-tag.
 */
function wpcf7_stripe_form_tag_handler( $tag ) {
	$card_element = sprintf(
		'&lt;div %s&gt;&lt;/div&gt;',
		wpcf7_format_atts( array(
			'class' =&gt; 'card-element wpcf7-form-control',
			'aria-invalid' =&gt; 'false',
		) )
	);

	$card_element = sprintf(
		'&lt;div class=&quot;wpcf7-form-control-wrap hidden&quot;&gt;%s&lt;/div&gt;',
		$card_element
	);

	$button_1_label = __( 'Proceed to checkout', 'contact-form-7' );

	if ( isset( $tag-&gt;values[0] ) ) {
		$button_1_label = trim( $tag-&gt;values[0] );
	}

	$button_1 = sprintf(
		'&lt;button %1$s&gt;%2$s&lt;/button&gt;',
		wpcf7_format_atts( array(
			'type' =&gt; 'submit',
			'class' =&gt; 'first',
		) ),
		esc_html( $button_1_label )
	);

	$button_2_label = __( 'Complete payment', 'contact-form-7' );

	if ( isset( $tag-&gt;values[1] ) ) {
		$button_2_label = trim( $tag-&gt;values[1] );
	}

	$button_2 = sprintf(
		'&lt;button %1$s&gt;%2$s&lt;/button&gt;',
		wpcf7_format_atts( array(
			'type' =&gt; 'button',
			'class' =&gt; 'second hidden',
		) ),
		esc_html( $button_2_label )
	);

	$buttons = sprintf(
		'&lt;span class=&quot;buttons has-spinner&quot;&gt;%1$s %2$s&lt;/span&gt;',
		$button_1, $button_2
	);

	return sprintf(
		'&lt;div class=&quot;wpcf7-stripe&quot;&gt;%1$s %2$s %3$s&lt;/div&gt;',
		$card_element,
		$buttons,
		'&lt;input type=&quot;hidden&quot; name=&quot;_wpcf7_stripe_payment_intent&quot; value=&quot;&quot; /&gt;'
	);
}
</textarea><br>
    <input type="submit" value="Save">
</form>