<?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_Media' ) ) :
class ACF_Media {
/**
* Constructor.
*
* @date 23/06/12
* @since 5.0.0
*
* @param void
* @return void
*/
public function __construct() {
// Localize media strings.
add_action( 'acf/enqueue_scripts', array( $this, 'enqueue_scripts' ) );
// Save files uploaded from basic `$_FILE` field.
add_action( 'acf/save_post', array( $this, 'save_files' ), 5, 1 );
// Hook into Media Upload to run additional logic.
add_filter( 'wp_handle_upload_prefilter', array( $this, 'handle_upload_prefilter' ), 10, 1 );
// Hook into Media Modal Query to run additional logic.
add_action( 'wp_ajax_query-attachments', array( $this, 'wp_ajax_query_attachments' ), -1 );
}
/**
* Fires when ACF scrtips are enqueued.
*
* @date 27/4/18
* @since 5.6.9
*
* @param void
* @return void
*/
public function enqueue_scripts() {
if ( wp_script_is( 'acf-input' ) ) {
acf_localize_text(
array(
'Select.verb' => _x( 'Select', 'verb', 'acf' ),
'Edit.verb' => _x( 'Edit', 'verb', 'acf' ),
'Update.verb' => _x( 'Update', 'verb', 'acf' ),
'Uploaded to this post' => __( 'Uploaded to this post', 'acf' ),
'Expand Details' => __( 'Expand Details', 'acf' ),
'Collapse Details' => __( 'Collapse Details', 'acf' ),
'Restricted' => __( 'Restricted', 'acf' ),
'All images' => __( 'All images', 'acf' ),
)
);
acf_localize_data(
array(
'mimeTypeIcon' => wp_mime_type_icon(),
'mimeTypes' => get_allowed_mime_types(),
)
);
}
}
/**
* Uploads attachments found in the basic `$_FILES` array.
*
* @date 24/10/2014
* @since 5.0.9
*
* @param string|integer $post_id The post ID being saved.
* @return void
*/
public function save_files( $post_id = 0 ) {
if ( isset( $_FILES['acf']['name'] ) ) { // phpcs:disable WordPress.Security.NonceVerification.Missing -- Verified upstream.
acf_upload_files();
}
}
/**
* Filters data for the current file being uploaded.
*
* @date 16/02/2015
* @since 5.1.5
*
* @param array $file An array of data for a single file.
* @return array
*/
public function handle_upload_prefilter( $file ) {
$field = $this->get_source_field();
if ( ! $field ) {
return $file;
}
// Validate the attachment and append any errors.
$errors = acf_validate_attachment( $file, $field, 'upload' );
/**
* Filters the errors for a file before it is uploaded to WordPress.
*
* @date 16/02/2015
* @since 5.1.5
*
* @param array $errors An array of errors.
* @param array $file An array of data for a single file.
* @param array $field The field array.
*/
$errors = apply_filters( "acf/upload_prefilter/type={$field['type']}", $errors, $file, $field );
$errors = apply_filters( "acf/upload_prefilter/name={$field['_name']}", $errors, $file, $field );
$errors = apply_filters( "acf/upload_prefilter/key={$field['key']}", $errors, $file, $field );
$errors = apply_filters( 'acf/upload_prefilter', $errors, $file, $field );
// Append errors.
if ( ! empty( $errors ) ) {
$file['error'] = implode( "\n", $errors );
}
// Ensure newly uploaded image contains "preview_size" within the "size" data.
add_filter( 'image_size_names_choose', array( $this, 'image_size_names_choose' ), 10, 1 );
// Return.
return $file;
}
/**
* Returns the field responsible for the current Media query or upload context.
*
* @date 21/5/21
* @since 5.9.7
*
* @param void
* @return array| false.
*/
private function get_source_field() {
$field = false;
// phpcs:disable WordPress.Security.NonceVerification.Missing -- Verified elsewhere.
// Search for field key within available data.
// Case 1) Media modal query.
if ( isset( $_POST['query']['_acfuploader'] ) ) {
$field_key = sanitize_text_field( $_POST['query']['_acfuploader'] );
// Case 2) Media modal upload.
} elseif ( isset( $_POST['_acfuploader'] ) ) {
$field_key = sanitize_text_field( $_POST['_acfuploader'] );
}
// phpcs:enable WordPress.Security.NonceVerification.Missing
// Attempt to load field.
// Note the `acf_get_field()` function will return false if not found.
if ( isset( $field_key ) ) {
$field = acf_get_field( $field_key );
}
return $field;
}
/**
* Fires during the WP Modal Query AJAX call.
*
* @date 26/06/2015
* @since 5.2.3
*
* @param void
* @return void
*/
function wp_ajax_query_attachments() {
if ( $this->get_source_field() ) {
add_filter( 'wp_prepare_attachment_for_js', array( $this, 'wp_prepare_attachment_for_js' ), 10, 3 );
add_filter( 'image_size_names_choose', array( $this, 'image_size_names_choose' ), 10, 1 );
} else {
add_filter( 'wp_prepare_attachment_for_js', array( $this, 'clear_acf_errors_for_core_requests' ), 5, 3 );
}
}
/**
* Append acf_errors false for non-acf media library calls to prevent media library caching.
*
* @date 31/8/21
* @since 5.10.2
*
* @param array $response Array of prepared attachment data.
* @param WP_Post $attachment Attachment object.
* @param array|false $meta Array of attachment meta data, or false if there is none.
* @return array
*/
function clear_acf_errors_for_core_requests( $response, $attachment, $meta ) {
$response['acf_errors'] = false;
return $response;
}
/**
* Filters attachment data as it is being prepared for JS.
*
* @date 21/5/21
* @since 5.9.7
*
* @param array $response Array of prepared attachment data.
* @param WP_Post $attachment Attachment object.
* @param array|false $meta Array of attachment meta data, or false if there is none.
* @return array
*/
function wp_prepare_attachment_for_js( $response, $attachment, $meta ) {
$field = $this->get_source_field();
// Validate the attachment and append any errors.
$errors = acf_validate_attachment( $response, $field, 'prepare' );
$response['acf_errors'] = false;
if ( ! empty( $errors ) ) {
$response['acf_errors'] = implode( '<br />', $errors );
}
// Return.
return $response;
}
/**
* Filters the names and labels of the default image sizes.
*
* @date 21/5/21
* @since 5.9.7
*
* @param array $size_names Array of image size labels keyed by their name.
* @return array
*/
function image_size_names_choose( $size_names ) {
$field = $this->get_source_field();
// Append "preview_size" setting to array of image sizes so WP will include in prepared JS data.
if ( isset( $field['preview_size'] ) ) {
$name = (string) $field['preview_size'];
$size_names[ $name ] = $name; // Don't worry about size label, it is never used.
}
return $size_names;
}
}
// Instantiate.
acf_new_instance( 'ACF_Media' );
endif; // class_exists check
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