<?php

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/**

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* Process and validate form entries.

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*

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* @since 1.0.0

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*/

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class WPForms_Process {

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/**

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* Store errors.

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*

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* @since 1.0.0

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*

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* @var array

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*/

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public $errors;

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/**

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* Store spam errors.

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*

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* @since 1.8.3

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*

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* @var array

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*/

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public $spam_errors;

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/**

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* Spam reason.

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*

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* @since 1.8.3

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*

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* @var string

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*/

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public $spam_reason;

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/**

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* Confirmation message.

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*

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* @var string

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*/

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public $confirmation_message;

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/**

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* Current confirmation.

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*

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* @since 1.6.9

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*

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* @var array

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*/

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private $confirmation;

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/**

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* Store formatted fields.

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*

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* @since 1.0.0

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*

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* @var array

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*/

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public $fields;

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/**

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* Store the ID of a successful entry.

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*

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* @since 1.2.3

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*

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* @var int

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*/

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public $entry_id = 0;

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/**

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* Form data and settings.

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*

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* @since 1.4.5

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*

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* @var array

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*/

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public $form_data;

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/**

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* If a valid return has was processed.

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*

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* @since 1.4.5

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*

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* @var bool

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*/

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public $valid_hash = false;

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/**

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* Primary class constructor.

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*

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* @since 1.0.0

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*/

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public function __construct() {

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$this->hooks();

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}

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/**

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* Register hooks.

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*

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* @since 1.8.3

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*/

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private function hooks() {

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add_action( 'wp', [ $this, 'listen' ] );

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add_action( 'wp_ajax_wpforms_submit', [ $this, 'ajax_submit' ] );

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add_action( 'wp_ajax_nopriv_wpforms_submit', [ $this, 'ajax_submit' ] );

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}

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/**

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* Listen to see if this is a return callback or a posted form entry.

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*

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* @since 1.0.0

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*/

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public function listen() {

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// Catch the post_max_size overflow.

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if ( $this->post_max_size_overflow() ) {

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return;

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}

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// phpcs:disable WordPress.Security.NonceVerification

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if ( ! empty( $_GET['wpforms_return'] ) ) {

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// Additional redirect trigger for addons.

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$this->entry_confirmation_redirect( '', sanitize_text_field( wp_unslash( $_GET['wpforms_return'] ) ) );

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}

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$form_id = ! empty( $_POST['wpforms']['id'] ) ? absint( $_POST['wpforms']['id'] ) : 0;

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if ( ! $form_id ) {

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return;

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}

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// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized

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$this->process( wp_unslash( $_POST['wpforms'] ) );

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// phpcs:enable WordPress.Security.NonceVerification

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if ( ! wpforms_is_amp() ) {

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return;

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}

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// Send 400 Bad Request when there are errors.

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if ( empty( $this->errors[ $form_id ] ) ) {

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wp_send_json(

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[

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'message' => $this->get_confirmation_message( $this->form_data, $this->fields, $this->entry_id ),

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],

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200

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);

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return;

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}

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$message = $this->errors[ $form_id ]['header'];

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if ( ! empty( $this->errors[ $form_id ]['footer'] ) ) {

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$message .= ' ' . $this->errors[ $form_id ]['footer'];

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}

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wp_send_json(

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[

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'message' => $message,

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],

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400

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);

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}

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/**

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* Process the form entry.

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*

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* @since 1.0.0

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* @since 1.6.4 Added hCaptcha support.

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*

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* @param array $entry Form submission raw data ($_POST).

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*/

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public function process( $entry ) {

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$this->errors = [];

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$this->fields = [];

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/* @var int $form_id Annotate the type explicitly. */

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$form_id = absint( $entry['id'] );

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$form = wpforms()->get( 'form' )->get( $form_id );

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// Validate form is real and active (published).

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if ( ! $form || $form->post_status !== 'publish' ) {

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$this->errors[ $form_id ]['header'] = esc_html__( 'Invalid form.', 'wpforms-lite' );

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return;

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}

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/**

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* Filter form data obtained during form process.

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*

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* @since 1.5.3

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*

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* @param array $form_data Form data.

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* @param array $entry Form entry.

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*/

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$this->form_data = (array) apply_filters( 'wpforms_process_before_form_data', wpforms_decode( $form->post_content ), $entry );

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if ( ! isset( $this->form_data['fields'], $this->form_data['id'] ) ) {

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$error_id = uniqid( '', true );

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// Logs missing form data.

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wpforms_log(

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/* translators: %s - error unique ID. */

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sprintf( esc_html__( 'Missing form data on form submission process %s', 'wpforms-lite' ), $error_id ),

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esc_html__( 'Form data is not an array in `\WPForms_Process::process()`. It might be caused by incorrect data returned by `wpforms_process_before_form_data` filter. Verify whether you have a custom code using this filter and debug value it is returning.', 'wpforms-lite' ),

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[

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'type' => [ 'error', 'entry' ],

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'form_id' => $form_id,

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]

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);

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$error_messages[] = esc_html__( 'Your form has not been submitted because data is missing from the entry.', 'wpforms-lite' );

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if ( wpforms_setting( 'logs-enable' ) && wpforms_current_user_can( wpforms_get_capability_manage_options() ) ) {

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$error_messages[] = sprintf(

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wp_kses( /* translators: %s - URL to the WForms Logs admin page. */

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__( 'Check the WPForms &raquo; Tools &raquo; <a href="%s">Logs</a> for more details.', 'wpforms-lite' ),

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[ 'a' => [ 'href' => [] ] ]

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),

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esc_url(

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add_query_arg(

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[

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'page' => 'wpforms-tool',

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'view' => 'logs',

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],

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admin_url( 'admin.php' )

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)

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)

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);

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/* translators: %s - error unique ID. */

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$error_messages[] = sprintf( esc_html__( 'Error ID: %s.', 'wpforms-lite' ), $error_id );

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}

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$errors[ $form_id ]['header'] = implode( '<br>', $error_messages );

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$this->errors = $errors;

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return;

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}

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/**

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* Filter form entry before processing.

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* Data is not validated or cleaned yet so use with caution.

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*

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* @since 1.4.0

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*

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* @param array $entry Form submission raw data ($_POST).

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* @param array $form_data Form data.

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*/

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$entry = apply_filters( 'wpforms_process_before_filter', $entry, $this->form_data );

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/**

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* Pre-process hook.

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*

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* @since 1.4.0

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*

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* @param array $entry Form submission raw data ($_POST).

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* @param array $form_data Form data.

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*/

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do_action( 'wpforms_process_before', $entry, $this->form_data );

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/**

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* Pre-process hook by form ID.

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*

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* @since 1.4.0

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*

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* @param array $entry Form submission raw data ($_POST).

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* @param array $form_data Form data.

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*/

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do_action( "wpforms_process_before_{$form_id}", $entry, $this->form_data );

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// Validate fields.

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foreach ( $this->form_data['fields'] as $field_properties ) {

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$field_id = $field_properties['id'];

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$field_type = $field_properties['type'];

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$field_submit = isset( $entry['fields'][ $field_id ] ) ? $entry['fields'][ $field_id ] : '';

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/**

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* Field type validation hook.

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*

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* @since 1.4.0

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*

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* @param int $field_id Field ID.

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* @param mixed $field_submit Submitted field value (raw data).

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* @param array $form_data Form data.

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*/

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do_action( "wpforms_process_validate_{$field_type}", $field_id, $field_submit, $this->form_data );

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}

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// Check if combined upload size exceeds allowed maximum.

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$this->validate_combined_upload_size( $form );

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/**

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* Filter initial errors.

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* Don't proceed if there are any errors thus far. We provide a filter

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* so that other features, such as conditional logic, have the ability

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* to adjust blocking errors.

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*

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* @since 1.4.0

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*

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* @param array $errors List of errors.

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* @param array $form_data Form data.

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*/

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$errors = apply_filters( 'wpforms_process_initial_errors', $this->errors, $this->form_data );

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if ( isset( $_POST['__amp_form_verify'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing

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if ( empty( $errors[ $form_id ] ) ) {

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wp_send_json( [], 200 );

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} else {

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$verify_errors = [];

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foreach ( $errors[ $form_id ] as $field_id => $error_fields ) {

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$field = $this->form_data['fields'][ $field_id ];

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$field_properties = wpforms()->get( 'frontend' )->get_field_properties( $field, $this->form_data );

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if ( is_string( $error_fields ) ) {

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if ( $field['type'] === 'checkbox' || $field['type'] === 'radio' || $field['type'] === 'select' ) {

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$first = current( $field_properties['inputs'] );

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$name = $first['attr']['name'];

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} elseif ( isset( $field_properties['inputs']['primary']['attr']['name'] ) ) {

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$name = $field_properties['inputs']['primary']['attr']['name'];

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}

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$verify_errors[] = [

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'name' => $name,

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'message' => $error_fields,

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];

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} else {

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foreach ( $error_fields as $error_field => $error_message ) {

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if ( isset( $field_properties['inputs'][ $error_field ]['attr']['name'] ) ) {

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$name = $field_properties['inputs'][ $error_field ]['attr']['name'];

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}

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$verify_errors[] = [

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'name' => $name,

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'message' => $error_message,

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];

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}

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}

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}

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wp_send_json(

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[

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'verifyErrors' => $verify_errors,

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],

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400

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);

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}

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return;

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}

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if ( ! empty( $errors[ $form_id ] ) ) {

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if ( empty( $errors[ $form_id ]['header'] ) && empty( $errors[ $form_id ]['footer'] ) ) {

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$errors[ $form_id ]['header'] = esc_html__( 'Form has not been submitted, please see the errors below.', 'wpforms-lite' );

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}

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$this->errors = $errors;

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return;

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}

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// If a logged-in user fails the nonce check, we want to log the entry, disable the errors and fail silently.

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// Please note that logs may be disabled and in this case nothing will be logged or reported.

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if (

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is_user_logged_in() &&

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( empty( $entry['nonce'] ) || ! wp_verify_nonce( $entry['nonce'], "wpforms::form_{$form_id}" ) )

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) {

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// Logs XSS attempt depending on log levels set.

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wpforms_log(

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'Cross-site scripting attempt ' . uniqid( '', true ),

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[ true, $entry ],

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[

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'type' => [ 'security' ],

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'form_id' => $this->form_data['id'],

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]

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);

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// Fail silently.

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return;

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}

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$honeypot = wpforms()->get( 'honeypot' )->validate( $this->form_data, $this->fields, $entry );

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// If we trigger the honey pot, we want to log the entry, disable the errors, and fail silently.

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if ( $honeypot ) {

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$this->log_spam_entry( $entry, $honeypot );

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// Fail silently.

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return;

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}

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$token = wpforms()->get( 'token' )->validate( $this->form_data, $this->fields, $entry );

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// If spam - return early.

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// For antispam, we want to make sure that we have a value, we are not using AMP, and the value is an error string.

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if ( $token && ! wpforms_is_amp() && is_string( $token ) ) {

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$this->errors[ $this->form_data['id'] ]['header'] = $token;

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$this->log_spam_entry( $entry, $token );

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return;

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}

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// Pass the form created date into the form data.

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$this->form_data['created'] = $form->post_date;

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// Format fields.

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foreach ( (array) $this->form_data['fields'] as $field_properties ) {

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$field_id = $field_properties['id'];

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$field_type = $field_properties['type'];

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$field_submit = isset( $entry['fields'][ $field_id ] ) ? $entry['fields'][ $field_id ] : '';

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/**

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* Format field by type.

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*

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* @since 1.4.0

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*

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* @param string $field_id Field ID.

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* @param string $field_submit Submitted field value.

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* @param array $form_data Form data and settings.

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*/

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do_action( "wpforms_process_format_{$field_type}", $field_id, $field_submit, $this->form_data );

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}

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/**

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* Format form data after all fields have been processed.

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* This hook is for internal purposes and should not be leveraged.

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*

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* @since 1.4.0

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*

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* @param array $form_data Form data and settings.

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*/

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do_action( 'wpforms_process_format_after', $this->form_data );

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/**

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* Filter fields before processing.

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* Process hooks/filter - this is where most addons should hook

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* because at this point we have completed all field validation and

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* formatted the data.

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*

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* @since 1.4.0

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*

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* @param array $fields Form fields.

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* @param array $entry Form submission raw data ($_POST).

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* @param array $form_data Form data and settings.

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*/

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$this->fields = apply_filters( 'wpforms_process_filter', $this->fields, $entry, $this->form_data );

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/**

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* Process form fields.

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*

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* @since 1.4.0

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*

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* @param array $fields Form fields.

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* @param array $entry Form submission raw data ($_POST).

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* @param array $form_data Form data and settings.

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*/

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do_action( 'wpforms_process', $this->fields, $entry, $this->form_data );

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/**

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* Process form fields by form ID.

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*

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* @since 1.4.0

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*

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* @param array $fields Form fields.

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* @param array $entry Form submission raw data ($_POST).

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* @param array $form_data Form data and settings.

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*/

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do_action( "wpforms_process_{$form_id}", $this->fields, $entry, $this->form_data );

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if ( ! $this->is_bypass_spam_check( $entry ) ) {

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// Check if the form was submitted too quickly.

[484] Fix | Delete

$this->time_limit_check();

[485] Fix | Delete

[486] Fix | Delete

// Check for spam.

[487] Fix | Delete

$this->process_spam_check( $entry );

[488] Fix | Delete

}

[489] Fix | Delete

[490] Fix | Delete

$store_spam_entries = ! empty( $this->form_data['settings']['store_spam_entries'] ) && $this->form_data['settings']['store_spam_entries'];

[491] Fix | Delete

[492] Fix | Delete

// Mark submission as spam if one of the spam checks failed and spam entries are stored.

[493] Fix | Delete

$marked_as_spam = $this->spam_reason && $store_spam_entries;

[494] Fix | Delete

[495] Fix | Delete

// Store spam reason.

[496] Fix | Delete

if ( $this->spam_reason ) {

[497] Fix | Delete

$this->form_data['spam_reason'] = $this->spam_reason;

[498] Fix | Delete

}

[499] Fix | Delete