<?php
/**
* @package ACF
* @author WP Engine
*
* © 2025 Advanced Custom Fields (ACF®). All rights reserved.
* "ACF" is a trademark of WP Engine.
* Licensed under the GNU General Public License v2 or later.
* https://www.gnu.org/licenses/gpl-2.0.html
*/
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
if ( ! class_exists( 'ACF_Local_JSON' ) ) :
class ACF_Local_JSON {
/**
* The found JSON field group files.
*
* @since 5.9.0
* @var array
*/
private $files = array();
/**
* Constructor.
*
* @date 14/4/20
* @since 5.9.0
*
* @param void
* @return void
*/
public function __construct() {
// Update settings.
acf_update_setting( 'save_json', get_stylesheet_directory() . '/acf-json' );
acf_append_setting( 'load_json', get_stylesheet_directory() . '/acf-json' );
// Add listeners.
add_action( 'acf/update_field_group', array( $this, 'update_field_group' ) );
add_action( 'acf/untrash_field_group', array( $this, 'update_field_group' ) );
add_action( 'acf/trash_field_group', array( $this, 'delete_field_group' ) );
add_action( 'acf/delete_field_group', array( $this, 'delete_field_group' ) );
add_action( 'acf/update_post_type', array( $this, 'update_internal_post_type' ) );
add_action( 'acf/untrash_post_type', array( $this, 'update_internal_post_type' ) );
add_action( 'acf/trash_post_type', array( $this, 'delete_internal_post_type' ) );
add_action( 'acf/delete_post_type', array( $this, 'delete_internal_post_type' ) );
add_action( 'acf/update_taxonomy', array( $this, 'update_internal_post_type' ) );
add_action( 'acf/untrash_taxonomy', array( $this, 'update_internal_post_type' ) );
add_action( 'acf/trash_taxonomy', array( $this, 'delete_internal_post_type' ) );
add_action( 'acf/delete_taxonomy', array( $this, 'delete_internal_post_type' ) );
// Include fields.
add_action( 'acf/include_fields', array( $this, 'include_fields' ) );
add_action( 'acf/include_post_types', array( $this, 'include_post_types' ) );
add_action( 'acf/include_taxonomies', array( $this, 'include_taxonomies' ) );
}
/**
* Returns true if this component is enabled.
*
* @date 14/4/20
* @since 5.9.0
*
* @param void
* @return boolean
*/
public function is_enabled() {
return (bool) acf_get_setting( 'json' );
}
/**
* Gets the path(s) to load JSON from.
*
* @since 6.2
*
* @return array
*/
public function get_load_paths() {
$paths = (array) acf_get_setting( 'load_json' );
/**
* Filters the path(s) used to load JSON from.
*
* @since 6.2
*
* @param array $paths An array of potential paths to load JSON from.
* @return array
*/
return (array) apply_filters( 'acf/json/load_paths', $paths );
}
/**
* Gets the path(s) to save JSON to.
*
* @since 6.2
*
* @param string $key The key to get paths for (optional).
* @param array $post The main ACF post array (optional).
* @return array
*/
public function get_save_paths( $key = '', $post = array() ) {
$name = ! empty( $post['title'] ) ? (string) $post['title'] : '';
$post_type = acf_determine_internal_post_type( $key );
$paths = array();
// Paths are sorted by priority, with key overriding name, etc.
$paths[] = acf_get_setting( "save_json/key={$key}" );
$paths[] = acf_get_setting( "save_json/name={$name}" );
$paths[] = acf_get_setting( "save_json/type={$post_type}" );
$paths[] = acf_get_setting( 'save_json' );
$paths = array_values( array_filter( $paths ) );
/**
* Filters the paths used to save JSON.
*
* @since 6.2
*
* @param array $paths An array of the potential paths to save JSON to.
* @param array $post The ACF field group, post type, or taxonomy array.
* @return array
*/
return (array) apply_filters( 'acf/json/save_paths', $paths, $post );
}
/**
* Writes field group data to JSON file.
*
* @date 14/4/20
* @since 5.9.0
*
* @param array $field_group The field group.
* @return void
*/
public function update_field_group( $field_group ) {
// Bail early if disabled.
if ( ! $this->is_enabled() ) {
return false;
}
// Append fields.
$field_group['fields'] = acf_get_fields( $field_group );
// Save to file.
$this->save_file( $field_group['key'], $field_group );
}
/**
* Writes ACF posts to the JSON file.
*
* @since 6.1
*
* @param array $post The main ACF post array.
* @return boolean
*/
public function update_internal_post_type( $post ) {
if ( ! $this->is_enabled() ) {
return false;
}
/**
* Filters the ACF post before saving it to the file.
*
* @since 6.1
*
* @param array $post The main ACF post array
*/
$post = apply_filters( 'acf/pre_save_json_file', $post );
return $this->save_file( $post['key'], $post );
}
/**
* Deletes a field group JSON file.
*
* @date 14/4/20
* @since 5.9.0
*
* @param array $field_group The field group.
* @return boolean
*/
public function delete_field_group( $field_group ) {
return $this->delete_internal_post_type( $field_group );
}
/**
* Deletes an ACF JSON file.
*
* @since 6.1
*
* @param array $post The main ACF post array.
* @return boolean
*/
public function delete_internal_post_type( $post ) {
if ( ! $this->is_enabled() ) {
return false;
}
// WP appends '__trashed' to the end of 'key' (post_name).
$key = str_replace( '__trashed', '', $post['key'] );
return $this->delete_file( $key, $post );
}
/**
* Includes all local JSON fields.
*
* @date 14/4/20
* @since 5.9.0
*
* @param void
* @return void
*/
public function include_fields() {
// Bail early if disabled.
if ( ! $this->is_enabled() ) {
return false;
}
// Get load paths.
$files = $this->scan_files( 'acf-field-group' );
foreach ( $files as $key => $file ) {
$json = json_decode( file_get_contents( $file ), true );
$json['local'] = 'json';
$json['local_file'] = $file;
acf_add_local_field_group( $json );
}
}
/**
* Includes all local JSON post types.
*
* @since 6.1
*/
public function include_post_types() {
// Bail early if disabled.
if ( ! $this->is_enabled() ) {
return false;
}
// Get load paths.
$files = $this->scan_files( 'acf-post-type' );
foreach ( $files as $key => $file ) {
$json = json_decode( file_get_contents( $file ), true );
$json['local'] = 'json';
$json['local_file'] = $file;
acf_add_local_internal_post_type( $json, 'acf-post-type' );
}
}
/**
* Includes all local JSON taxonomies.
*
* @since 6.1
*/
public function include_taxonomies() {
// Bail early if disabled.
if ( ! $this->is_enabled() ) {
return false;
}
// Get load paths.
$files = $this->scan_files( 'acf-taxonomy' );
foreach ( $files as $key => $file ) {
$json = json_decode( file_get_contents( $file ), true );
$json['local'] = 'json';
$json['local_file'] = $file;
acf_add_local_internal_post_type( $json, 'acf-taxonomy' );
}
}
/**
* Scans for JSON field groups.
*
* @date 14/4/20
* @since 5.9.0
*
* @return array
*/
function scan_field_groups() {
return $this->scan_files( 'acf-field-group' );
}
/**
* Scans for JSON files.
*
* @since 6.1
*
* @param string $post_type The ACF post type to scan for.
* @return array
*/
function scan_files( $post_type = 'acf-field-group' ) {
$json_files = array();
// Loop over "local_json" paths and parse JSON files.
foreach ( $this->get_load_paths() as $path ) {
if ( is_dir( $path ) ) {
$files = scandir( $path );
if ( $files ) {
foreach ( $files as $filename ) {
// Ignore hidden files.
if ( $filename[0] === '.' ) {
continue;
}
// Ignore sub directories.
$file = untrailingslashit( $path ) . '/' . $filename;
if ( is_dir( $file ) ) {
continue;
}
// Ignore non JSON files.
$ext = pathinfo( $filename, PATHINFO_EXTENSION );
if ( $ext !== 'json' ) {
continue;
}
// Read JSON data.
$json = json_decode( file_get_contents( $file ), true );
if ( ! is_array( $json ) || ! isset( $json['key'] ) ) {
continue;
}
// Append data.
$json_files[ $json['key'] ] = $file;
}
}
}
}
// Store data and return.
$this->files = $json_files;
return $this->get_files( $post_type );
}
/**
* Returns an array of found JSON files.
*
* @date 14/4/20
* @since 5.9.0
*
* @param string $post_type The ACF post type to get files for.
* @return array
*/
public function get_files( $post_type = 'acf-field-group' ) {
$files = array();
foreach ( $this->files as $key => $path ) {
$internal_post_type = acf_determine_internal_post_type( $key );
if ( $internal_post_type === $post_type ) {
$files[ $key ] = $path;
} elseif ( 'acf-field-group' === $post_type ) {
// If we can't figure out the ACF post type, make an educated guess that it's a field group.
$json = json_decode( file_get_contents( $path ), true );
if ( ! is_array( $json ) ) {
continue;
}
if ( isset( $json['fields'] ) ) {
$files[ $key ] = $path;
}
}
}
return $files;
}
/**
* Gets the filename for an ACF JSON file.
*
* @since 6.3
*
* @param string $key The ACF post key.
* @param array $post The main ACF post array.
* @return string|boolean
*/
public function get_filename( $key, $post ) {
$load_path = '';
if ( is_array( $this->files ) && isset( $this->files[ $key ] ) ) {
$load_path = $this->files[ $key ];
}
/**
* Filters the filename used when saving JSON.
*
* @since 6.2
*
* @param string $filename The default filename.
* @param array $post The main post array for the item being saved.
* @param string $load_path The path that the item was loaded from.
*/
$filename = apply_filters( 'acf/json/save_file_name', $key . '.json', $post, $load_path );
if ( ! is_string( $filename ) ) {
return false;
}
$filename = sanitize_file_name( $filename );
// sanitize_file_name() can potentially remove all characters.
if ( empty( $filename ) ) {
return false;
}
return $filename;
}
/**
* Saves an ACF JSON file.
*
* @date 17/4/20
* @since 5.9.0
*
* @param string $key The ACF post key.
* @param array $post The main ACF post array.
* @return boolean
*/
public function save_file( $key, $post ) {
$paths = $this->get_save_paths( $key, $post );
$filename = $this->get_filename( $key, $post );
$file = false;
$first_writable = false;
if ( ! $filename ) {
return false;
}
foreach ( $paths as $path ) {
if ( ! is_writable( $path ) ) { //phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_is_writable -- non-compatible function for this purpose.
continue;
}
if ( false === $first_writable ) {
$first_writable = $path;
}
$file_to_check = trailingslashit( $path ) . $filename;
if ( is_file( $file_to_check ) ) {
$file = $file_to_check;
}
}
if ( ! $file ) {
if ( $first_writable ) {
$file = trailingslashit( $first_writable ) . $filename;
} else {
return false;
}
}
// Make sure this is a valid ACF post type.
$post_type = acf_determine_internal_post_type( $key );
if ( ! $post_type ) {
return false;
}
// Append modified time.
if ( $post['ID'] ) {
$post['modified'] = get_post_modified_time( 'U', true, $post['ID'] );
} else {
$post['modified'] = strtotime( 'now' );
}
// Prepare for export and save the file.
$post = acf_prepare_internal_post_type_for_export( $post, $post_type );
$result = file_put_contents( $file, acf_json_encode( $post ) . apply_filters( 'acf/json/eof_newline', PHP_EOL ) ); //phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents -- potentially could run outside of admin.
// Return true if bytes were written.
return is_int( $result );
}
/**
* Deletes an ACF JSON file.
*
* @date 17/4/20
* @since 5.9.0
*
* @param string $key The ACF post key.
* @param array $post The main ACF post array.
* @return boolean
*/
public function delete_file( $key, $post = array() ) {
$paths = $this->get_save_paths( $key, $post );
$filename = $this->get_filename( $key, $post );
if ( ! $filename ) {
return false;
}
foreach ( $paths as $path_to_check ) {
$file = untrailingslashit( $path_to_check ) . '/' . $filename;
if ( is_writable( $file ) ) { //phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_is_writable -- non-compatible function for this purpose.
wp_delete_file( $file );
}
}
return true;
}
/**
* Includes all local JSON files.
*
* @date 10/03/2014
* @since 5.0.0
* @deprecated 5.9.0
*/
public function include_json_folders() {
_deprecated_function( __METHOD__, '5.9.0', 'ACF_Local_JSON::include_fields()' );
$this->include_fields();
}
/**
* Includes local JSON files within a specific folder.
*
* @date 01/05/2017
* @since 5.5.13
* @deprecated 5.9.0
*
* @param string $path The path to a specific JSON folder.
* @return void
*/
public function include_json_folder( $path = '' ) {
_deprecated_function( __METHOD__, '5.9.0' );
// Do nothing.
}
}
// Initialize.
acf_new_instance( 'ACF_Local_JSON' );
endif; // class_exists check
/**
* Returns an array of found JSON field group files.
*
* @date 14/4/20
* @since 5.9.0
*
* @param string $post_type The ACF post type to get files for.
* @return array
*/
function acf_get_local_json_files( $post_type = 'acf-field-group' ) {
return acf_get_instance( 'ACF_Local_JSON' )->get_files( $post_type );
}
/**
* Saves a field group JSON file.
*
* @date 5/12/2014
* @since 5.1.5
*
* @param array $field_group The field group.
* @return boolean
*/
function acf_write_json_field_group( $field_group ) {
return acf_get_instance( 'ACF_Local_JSON' )->save_file( $field_group['key'], $field_group );
}
/**
* Deletes a field group JSON file.
*
* @date 5/12/2014
* @since 5.1.5
*
* @param string $key The field group key.
* @return boolean True on success.
*/
function acf_delete_json_field_group( $key ) {
return acf_get_instance( 'ACF_Local_JSON' )->delete_file( $key );
}
All system for education purposes only. For more tools: Telegram @jackleet