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Home / Docs / fc_checkout_is_valid_phone_number

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Customizations

  • Change the icon or icon color for the cart button on mobile
  • Move the “Phone” field to the contact step
  • Configure cart quantity fields for decimal quantities
  • Change fields copied from shipping address to billing address
  • Move first and last name fields to the contact step
  • Using Google Address Autocomplete on custom address fields and sections
  • Fix order summary and progress bar being cut off by the site’s header
  • Combine cart and checkout pages for WooCommerce
  • Enable address autocomplete by zip code or post code
  • Customize Local Pickup location address and use multiple pickup locations
  • Customize button colors and other button styles
  • Customize colors of elements on Fluid Checkout
  • Customize template files for WooCommerce and Fluid Checkout
  • Customize checkout steps
  • Add custom house number field and make it required
  • Customize checkout fields and adding custom checkout fields
  • Safely add code snippets to your WooCommerce website

Compatibility

  • Fix missing VAT field when using checkout fields customization plugins
  • Compatibility with Delivery Date or Pickup Date plugins
  • Compatibility with plugin Nextend Social Login
  • Compatibility with plugin SMS for WooCommerce by Zorem
  • Compatibility with plugin WooCommerce Smart Coupons by StoreApps
  • Compatibility with plugin Order Delivery for WooCommerce by Kestrel
  • Compatibility with plugin WooCommerce Germanized
  • Compatibility with plugin YITH WooCommerce Cart Messages Premium
  • Compatibility with plugin Shipping Zones by Drawing
  • Compatibility with plugin Elementor
  • Compatibility with plugin MyParcel
  • Compatibility with theme The Gem
  • Compatibility with plugin WooCommerce Delivery Slots by Iconic
  • Compatibility with plugin Mailchimp for WooCommerce
  • Compatibility with plugin WooCommerce Checkout Manager By QuadLayers
  • Compatibility with plugin Breakdance
  • Compatibility with theme Pressmart
  • Compatibility with theme Divi and the Divi Builder
  • Compatibility with WooCommerce Block-based checkout and cart forms
  • Compatibility with theme Goya
  • Compatibility with theme Botiga
  • Compatibility with theme Atomion
  • Compatibility with theme OceanWP
  • Compatibility with plugin Digits
  • Compatibility with plugin Storefront Powerpack
  • Troubleshooting – jQuery events or vanilla JavaScript events not working
  • Compatibility with theme ZK Nito
  • Compatibility with Checkout Field Editor (free and PRO) by ThemeHigh
  • Compatibility with theme Woodmart
  • Compatibility with plugin “Plugin Organizer”

Troubleshooting

  • Fix missing VAT field when using checkout fields customization plugins
  • Fix result types configuration for more accurate address suggestions
  • Troubleshooting – jQuery events or vanilla JavaScript events not working
  • Troubleshooting – Local pickup prevents customer from proving a shipping address, blocking other shipping methods
  • Troubleshooting – Redirected to error 404 (page not found) when trying to delete an address from the Address Book
  • Troubleshooting – Google Addresses Autocomplete not working despite following installation guide
  • Troubleshooting – Trust symbols widgets randomly moving to other areas when switching themes

Account & Purchases

  • Can I get a refund for my purchase?
  • Finding my invoice, adding billing details and VAT number
  • New versions updates are not appearing on my website

Development

  • Filter and action hooks – Address Book
  • Filter and action hooks – Google Address Autocomplete
  • Filter and action hooks – EU-VAT Assistant
  • Changelog – Fluid Checkout EU-VAT Assistant
  • Troubleshooting – jQuery events or vanilla JavaScript events not working
  • Changelog – Fluid Checkout Address Book
  • Checking data returned from Google Address Autocomplete address search
  • Changelog – Google Address Autocomplete
  • Changelog format and semantic version numbers
  • Changelog – Fluid Checkout PRO & Lite

Filter and action hooks

  • fc_before_substep_fields_{$substep_id}
  • fc_after_substep_fields_{$substep_id}
  • fc_after_substep_{$substep_id}
  • fc_before_substep_{$substep_id}
  • fc_checkout_order_review_actions
  • fc_pro_checkout_review_order_after_order_total
  • fc_pro_checkout_review_order_before_order_total
  • fc_pro_order_pay_order_review_table
  • fc_pro_collapsible_order_review_toggle_content
  • fc_pro_collapsible_order_review_content
  • fc_pro_checkout_order_summary_collapsible_initial_state
  • fc_checkout_order_review_content
  • fc_checkout_column_layout
  • fc_pro_checkout_order_summary_collapsible_toggle_title_text
  • fc_pro_checkout_order_summary_collapsible_toggle_amount_text
  • fc_shipping_methods_before_packages_inside
  • fc_shipping_methods_before_packages
  • fc_shipping_methods_after_packages_inside
  • fc_shipping_methods_after_packages
  • fc_before_checkout_shipping_address_wrapper
  • fc_before_checkout_shipping_only_form
  • fc_after_checkout_billing_only_form_inside
  • fc_place_order_custom_buttons
  • fc_order_summary_cart_item_details
  • fc_order_summary_cart_item_totals_before
  • fc_order_summary_cart_item_totals_after
  • fc_substep_coupon_codes_text_after
  • fc_review_order_shipping
  • fc_before_checkout_billing_only_form
  • fc_place_order
  • fc_coupon_code_section_after
  • fc_coupon_code_section_before
  • fc_substep_coupon_codes_text_before
  • fc_get_checkout_layout
  • fc_pro_checkout_review_order_after_coupon_code
  • fc_checkout_before_main_section
  • fc_checkout_after_main_section
  • fc_checkout_before_main_section_wrapper
  • fc_checkout_after_main_section_wrapper
  • fc_checkout_before
  • fc_checkout_before_step
  • fc_checkout_after_step
  • fc_checkout_start_step
  • fc_checkout_end_step
  • fc_checkout_before_contact_fields
  • fc_checkout_contact_before_fields
  • fc_checkout_contact_after_fields
  • fc_checkout_after_contact_fields
  • fc_checkout_below_contact_login_cta
  • fc_checkout_before_step_shipping_fields
  • fc_checkout_after_step_shipping_fields
  • fc_checkout_before_step_shipping_fields_inside
  • fc_checkout_after_step_shipping_fields_inside
  • fc_checkout_before_step_billing_fields
  • fc_checkout_after_step_billing_fields
  • fc_checkout_steps
  • fc_checkout_before_steps
  • fc_checkout_after_steps
  • fc_checkout_after
  • fc_checkout_before_step_payment_fields
  • fc_checkout_payment
  • fc_checkout_after_step_payment_fields
  • fc_checkout_place_order_terms
  • fc_checkout_order_review_section
  • fc_checkout_before_order_review_inside
  • fc_checkout_after_order_review_title_after
  • fc_checkout_after_order_review
  • fc_checkout_after_order_review_inside
  • fc_checkout_header
  • fc_checkout_header_logo
  • fc_checkout_header_widgets
  • fc_checkout_header_cart_link
  • fc_checkout_header_widgets_inside_before
  • fc_checkout_footer
  • fc_checkout_footer_widgets
  • fc_checkout_footer_widgets_inside_before
  • fc_checkout_footer_widgets_inside_after
  • fc_checkout_account_after_fields
  • fc_checkout_account_before_fields
  • fc_checkout_before_payment
  • fc_checkout_after_payment
  • fc_checkout_header_widgets_inside_after
  • fc_checkout_account_fields_empty_section
  • fc_adb_enable_compat_plugin_{plugin_slug}
  • fc_adb_enable_compat_theme_{theme_slug}
  • fc_adb_enable_compat_plugin_style_{plugin_slug}
  • fc_adb_enable_compat_theme_style_{theme_slug}
  • fc_pro_before_save_address_from_account
  • fc_pro_process_address_book_entry_field_{$key}
  • fc_pro_address_book_entries_start_tag_markup
  • fc_pro_address_book_entries_end_tag_markup
  • fc_pro_address_book_entry_markup
  • fc_pro_address_book_address_sources_options
  • fc_pro_address_book_entry_display_label_remove_skip_list
  • fc_pro_address_book_entry_label_markup
  • fc_pro_address_book_entry_display_data
  • fc_pro_address_book_entry_compare_field_keys_skip_list
  • fc_pro_address_book_entry_is_empty_field_keys_skip_list
  • fc_pro_address_book_save_from_order_skip_fields
  • fc_pro_address_book_save_from_order_extra_fields
  • fc_pro_address_book_field_keys
  • fc_pro_address_book_shipping_force_set_value_field_keys
  • fc_pro_address_book_fields_remove_skip_list
  • fc_pro_address_book_fields_add_skip_list
  • fc_pro_address_book_js_settings
  • fc_pro_address_book_migration_users_per_request
  • fc_pro_address_book_privacy_export_address_book_entry_props
  • fc_pro_address_book_address_fields
  • fc_vat_is_vat_number_field
  • fc_vat_number_field_args
  • fc_vat_enable_compat_{$page}_style_{$theme_slug}
  • fc_vat_enable_compat_theme_{theme_slug}
  • fc_vat_enable_compat_plugin_{plugin_slug}
  • fc_vat_enable_compat_{$page}_plugin_style_{$plugin_slug}
  • fc_pro_before_shipping_calculator
  • fc_pro_after_shipping_calculator
  • fc_pro_address_book_before_checkout_entries_list
  • fc_pro_address_book_after_checkout_entries_list
  • fc_pro_{$address_type}_address_book_before_entries
  • fc_pro_{$address_type}_address_book_after_entries
  • fc_pro_edit_account_address_form
  • fc_pro_address_book_save_checkout_field
  • fc_gaa_settings
  • fc_gaa_brasil_api_autocomplete_js_settings
  • fc_gaa_google_places_api_language
  • fc_gaa_enable_compat_plugin_{plugin_slug}
  • fc_gaa_enable_compat_theme_{theme_slug}
  • fc_gaa_google_places_api_script_dependencies
  • fc_gaa_google_places_api_url_parameters
  • fc_gaa_google_autocomplete_js_settings
  • fc_gaa_use_field_description_for_instructions
  • fc_gaa_is_checkout_page_or_fragment
  • fc_pro_{$address_type}_address_label_checkout_field
  • fc_pro_cart_shipping_calculator_initially_expanded
  • fc_pro_cart_shipping_calculator_button_classes
  • fc_pro_address_book_entries_account_start_tag_markup
  • fc_pro_address_book_entries_account_end_tag_markup
  • fc_pro_address_book_entry_account_edit_button_classes
  • fc_pro_address_book_entry_account_delete_button_classes
  • fc_gaa_display_legacy_api_settings
  • fc_pro_address_book_edit_address_entry_title
  • fc_pro_address_book_edit_address_entry_title_element
  • fc_pro_address_book_entry_before_add
  • fc_pro_address_book_entries_before_add_entry
  • fc_pro_address_book_billing_force_set_value_field_keys
  • fc_pro_address_book_privacy_export_address_book_entry_field_value
  • fc_pro_address_book_entry_account_markup
  • fc_pro_address_book_entry_before_update
  • fc_register_steps
  • fc_checkout_before_order_review
  • fc_checkout_after_order_review_title_before
  • fc_add_container_class
  • fc_checkout_html_custom_attributes
  • fc_design_template_option_image_url
  • fc_checkout_login_button_class
  • fc_enable_checkout_email_mailcheck
  • fc_checkout_is_valid_phone_number
  • fc_output_billing_same_as_shipping_as_hidden_field
  • fc_enable_order_summary_cart_item_unit_price
  • fc_{current_section}_settings_add
  • Compatibility with plugin Dintero Checkout for WooCommerce
  • fc_compat_theme_woodmart_disable_theme_checkout_options
  • Compatibility with plugin Brazilian Market on WooCommerce
  • fc_integration_woo_checkout_field_editor_pro_enable_edit_address_changes
  • fc_thwcfe_clear_field_keys_skip_list
  • fc_pro_cart_item_totals_before
  • fc_pro_is_order_pay_page_or_fragment
  • fc_pro_cart_body_custom_attributes
  • fc_pro_order_received_failed_display_action_orders
  • fc_pro_order_details_order_statuses_display
  • fc_pro_order_pay_shipping_method_substep_text_package_destination_data
  • fc_pro_enable_cart_display_items_unit_price
  • fc_pro_woocommerce_germanized_preferred_delivery_location_position_args
  • fc_pro_is_substep_delivery_slots_visible
  • fc_pro_before_coupon_code_form_elements_cart
  • fc_pro_after_coupon_code_form_elements_cart
  • fc_checkout_social_login
  • fc_checkout_social_login_separator_text
  • fc_mailcheck_suggestion_message
  • fc_pro_address_book_is_address_entry_valid_for_checkout
  • fc_pro_address_book_entry_account_add_button_classes
  • fc_pro_address_book_entry_account_cancel_button_classes
  • fc_pro_address_book_entry_account_save_button_classes
  • fc_billing_step_hook_priority
  • fc_compat_dintero_checkout_skip_undo_hooks_classes
  • fc_compat_dintero_checkout_skip_undo_hooks_early_classes
  • fc_pro_view_order_section_hook_priority_order_overview
  • fc_pro_cart_section_hook_priority_woodmart_free_gifts
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fc_checkout_is_valid_phone_number

Back to list of all filter and action hooks for Fluid Checkout Lite.

Description #

Allows changing the phone number validation logic.

Parameters #

  • $is_valid (bool) Whether the phone number is valid.
  • $phone_number (string) The phone number to validate.
  • $field_key (string) The field key. Defaults to null, might not be passed in some cases.
  • $field_args (array) The checkout field arguments array. Defaults to null, might not be passed in some cases.
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Updated on December 15, 2025
fc_enable_checkout_email_mailcheckfc_output_billing_same_as_shipping_as_hidden_field
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