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Edit File: actions.php

<?php if ( ! defined( 'ABSPATH' ) ) { die; } // Cannot access directly.

/**

* Get icons from admin ajax

* @since 1.0.0

* @version 1.0.0

if ( ! function_exists( 'csf_get_icons' ) ) {

function csf_get_icons() {

$nonce = ( ! empty( $_POST[ 'nonce' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'nonce' ] ) ) : '';

if ( ! wp_verify_nonce( $nonce, 'csf_icon_nonce' ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: Invalid nonce verification.', 'csf' ) ) );

}

ob_start();

$icon_library = ( apply_filters( 'csf_fa4', false ) ) ? 'fa4' : 'fa5';

CSF::include_plugin_file( 'fields/icon/'. $icon_library .'-icons.php' );

$icon_lists = apply_filters( 'csf_field_icon_add_icons', csf_get_default_icons() );

if ( ! empty( $icon_lists ) ) {

foreach ( $icon_lists as $list ) {

echo ( count( $icon_lists ) >= 2 ) ? '<div class="csf-icon-title">'. esc_attr( $list['title'] ) .'</div>' : '';

foreach ( $list['icons'] as $icon ) {

echo '<i title="'. esc_attr( $icon ) .'" class="'. esc_attr( $icon ) .'"></i>';

}

} else {

echo '<div class="csf-error-text">'. esc_html__( 'No data available.', 'csf' ) .'</div>';

}

$content = ob_get_clean();

wp_send_json_success( array( 'content' => $content ) );

}

add_action( 'wp_ajax_csf-get-icons', 'csf_get_icons' );

}

/**

* Export

* @since 1.0.0

* @version 1.0.0

if ( ! function_exists( 'csf_export' ) ) {

function csf_export() {

$nonce  = ( ! empty( $_GET[ 'nonce' ] ) ) ? sanitize_text_field( wp_unslash( $_GET[ 'nonce' ] ) ) : '';

$unique = ( ! empty( $_GET[ 'unique' ] ) ) ? sanitize_text_field( wp_unslash( $_GET[ 'unique' ] ) ) : '';

if ( ! wp_verify_nonce( $nonce, 'csf_backup_nonce' ) ) {

die( esc_html__( 'Error: Invalid nonce verification.', 'csf' ) );

}

if ( empty( $unique ) ) {

die( esc_html__( 'Error: Invalid key.', 'csf' ) );

}

// Export

header('Content-Type: application/json');

header('Content-disposition: attachment; filename=backup-'. gmdate( 'd-m-Y' ) .'.json');

header('Content-Transfer-Encoding: binary');

header('Pragma: no-cache');

header('Expires: 0');

echo json_encode( get_option( $unique ) );

die();

}

add_action( 'wp_ajax_csf-export', 'csf_export' );

}

/**

* Import Ajax

* @since 1.0.0

* @version 1.0.0

if ( ! function_exists( 'csf_import_ajax' ) ) {

function csf_import_ajax() {

$nonce  = ( ! empty( $_POST[ 'nonce' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'nonce' ] ) ) : '';

$unique = ( ! empty( $_POST[ 'unique' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'unique' ] ) ) : '';

$data   = ( ! empty( $_POST[ 'data' ] ) ) ? wp_kses_post_deep( json_decode( wp_unslash( trim( $_POST[ 'data' ] ) ), true ) ) : array();

if ( ! wp_verify_nonce( $nonce, 'csf_backup_nonce' ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: Invalid nonce verification.', 'csf' ) ) );

}

if ( empty( $unique ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: Invalid key.', 'csf' ) ) );

}

if ( empty( $data ) || ! is_array( $data ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: The response is not a valid JSON response.', 'csf' ) ) );

}

// Success

update_option( $unique, $data );

wp_send_json_success();

}

add_action( 'wp_ajax_csf-import', 'csf_import_ajax' );

}

/**

* Reset Ajax

* @since 1.0.0

* @version 1.0.0

if ( ! function_exists( 'csf_reset_ajax' ) ) {

function csf_reset_ajax() {

$nonce  = ( ! empty( $_POST[ 'nonce' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'nonce' ] ) ) : '';

$unique = ( ! empty( $_POST[ 'unique' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'unique' ] ) ) : '';

if ( ! wp_verify_nonce( $nonce, 'csf_backup_nonce' ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: Invalid nonce verification.', 'csf' ) ) );

}

// Success

delete_option( $unique );

wp_send_json_success();

}

add_action( 'wp_ajax_csf-reset', 'csf_reset_ajax' );

}

/**

* Chosen Ajax

* @since 1.0.0

* @version 1.0.0

if ( ! function_exists( 'csf_chosen_ajax' ) ) {

function csf_chosen_ajax() {

$nonce = ( ! empty( $_POST[ 'nonce' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'nonce' ] ) ) : '';

$type  = ( ! empty( $_POST[ 'type' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'type' ] ) ) : '';

$term  = ( ! empty( $_POST[ 'term' ] ) ) ? sanitize_text_field( wp_unslash( $_POST[ 'term' ] ) ) : '';

$query = ( ! empty( $_POST[ 'query_args' ] ) ) ? wp_kses_post_deep( $_POST[ 'query_args' ] ) : array();

if ( ! wp_verify_nonce( $nonce, 'csf_chosen_ajax_nonce' ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: Invalid nonce verification.', 'csf' ) ) );

}

if ( empty( $type ) || empty( $term ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: Invalid term ID.', 'csf' ) ) );

}

$capability = apply_filters( 'csf_chosen_ajax_capability', 'manage_options' );

if ( ! current_user_can( $capability ) ) {

wp_send_json_error( array( 'error' => esc_html__( 'Error: You do not have permission to do that.', 'csf' ) ) );

}

// Success

$options = CSF_Fields::field_data( $type, $term, $query );

wp_send_json_success( $options );

}

add_action( 'wp_ajax_csf-chosen', 'csf_chosen_ajax' );

}