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📄 admin-filters.php	File	8034	Edit Download
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📄 ajax-actions.php	File	151629	Edit Download
📄 bookmark.php	File	11725	Edit Download
📄 class-automatic-upgrader-skin.php	File	3663	Edit Download
📄 class-bulk-plugin-upgrader-skin.php	File	2590	Edit Download
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📄 class-file-upload-upgrader.php	File	4163	Edit Download
📄 class-ftp-pure.php	File	5426	Edit Download
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📄 class-language-pack-upgrader-skin.php	File	2870	Edit Download
📄 class-language-pack-upgrader.php	File	15561	Edit Download
📄 class-pclzip.php	File	196695	Edit Download
📄 class-plugin-installer-skin.php	File	12053	Edit Download
📄 class-plugin-upgrader-skin.php	File	3278	Edit Download
📄 class-plugin-upgrader.php	File	23243	Edit Download
📄 class-theme-installer-skin.php	File	12743	Edit Download
📄 class-theme-upgrader-skin.php	File	4176	Edit Download
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📄 class-walker-category-checklist.php	File	5091	Edit Download
📄 class-walker-nav-menu-checklist.php	File	5628	Edit Download
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📄 class-wp-ajax-upgrader-skin.php	File	4193	Edit Download
📄 class-wp-application-passwords-list-table.php	File	6949	Edit Download
📄 class-wp-automatic-updater.php	File	61902	Edit Download
📄 class-wp-comments-list-table.php	File	33056	Edit Download
📄 class-wp-community-events.php	File	18769	Edit Download
📄 class-wp-debug-data.php	File	66619	Edit Download
📄 class-wp-filesystem-base.php	File	24410	Edit Download
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📄 class-wp-filesystem-ftpext.php	File	23101	Edit Download
📄 class-wp-filesystem-ftpsockets.php	File	18479	Edit Download
📄 class-wp-filesystem-ssh2.php	File	23310	Edit Download
📄 class-wp-importer.php	File	7499	Edit Download
📄 class-wp-internal-pointers.php	File	4577	Edit Download
📄 class-wp-links-list-table.php	File	9241	Edit Download
📄 class-wp-list-table-compat.php	File	1497	Edit Download
📄 class-wp-list-table.php	File	52906	Edit Download
📄 class-wp-media-list-table.php	File	25899	Edit Download
📄 class-wp-ms-sites-list-table.php	File	22019	Edit Download
📄 class-wp-ms-themes-list-table.php	File	28438	Edit Download
📄 class-wp-ms-users-list-table.php	File	15719	Edit Download
📄 class-wp-plugin-install-list-table.php	File	24786	Edit Download
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📄 class-wp-post-comments-list-table.php	File	1453	Edit Download
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📄 class-wp-privacy-data-export-requests-list-table.php	File	5563	Edit Download
📄 class-wp-privacy-data-removal-requests-list-table.php	File	5715	Edit Download
📄 class-wp-privacy-policy-content.php	File	32626	Edit Download
📄 class-wp-privacy-requests-table.php	File	14395	Edit Download
📄 class-wp-screen.php	File	37327	Edit Download
📄 class-wp-site-health-auto-updates.php	File	14337	Edit Download
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📄 class-wp-terms-list-table.php	File	21182	Edit Download
📄 class-wp-theme-install-list-table.php	File	15599	Edit Download
📄 class-wp-themes-list-table.php	File	10349	Edit Download
📄 class-wp-upgrader-skin.php	File	7110	Edit Download
📄 class-wp-upgrader-skins.php	File	1477	Edit Download
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📄 class-wp-users-list-table.php	File	19058	Edit Download
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📄 import.php	File	6617	Edit Download
📄 list-table.php	File	3802	Edit Download
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📄 template.php	File	98529	Edit Download
📄 theme-install.php	File	6990	Edit Download
📄 theme.php	File	47742	Edit Download
📄 translation-install.php	File	11075	Edit Download
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📄 user.php	File	23532	Edit Download
📄 widgets.php	File	10912	Edit Download

📝 Editing: class-file-upload-upgrader.php Size: 4,163 bytes Lines: 159 Type: .php

<?php
/**
 * Upgrade API: File_Upload_Upgrader class
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 4.6.0
 */

/**
 * Core class used for handling file uploads.
 *
 * This class handles the upload process and passes it as if it's a local file
 * to the Upgrade/Installer functions.
 *
 * @since 2.8.0
 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
 */
#[AllowDynamicProperties]
class File_Upload_Upgrader {

/**
	 * The full path to the file package.
	 *
	 * @since 2.8.0
	 * @var string $package
	 */
	public $package;

/**
	 * The name of the file.
	 *
	 * @since 2.8.0
	 * @var string $filename
	 */
	public $filename;

/**
	 * The ID of the attachment post for this file.
	 *
	 * @since 3.3.0
	 * @var int $id
	 */
	public $id = 0;

/**
	 * Construct the upgrader for a form.
	 *
	 * @since 2.8.0
	 *
	 * @param string $form      The name of the form the file was uploaded from.
	 * @param string $urlholder The name of the `GET` parameter that holds the filename.
	 */
	public function __construct( $form, $urlholder ) {

if ( empty( $_FILES[ $form ]['name'] ) && empty( $_GET[ $urlholder ] ) ) {
			wp_die( __( 'Please select a file' ) );
		}

// Handle a newly uploaded file. Else, assume it's already been uploaded.
		if ( ! empty( $_FILES ) ) {
			$overrides = array(
				'test_form' => false,
				'test_type' => false,
			);
			$file      = wp_handle_upload( $_FILES[ $form ], $overrides );

if ( isset( $file['error'] ) ) {
				wp_die( $file['error'] );
			}

if ( 'pluginzip' === $form || 'themezip' === $form ) {
				if ( ! wp_zip_file_is_valid( $file['file'] ) ) {
					wp_delete_file( $file['file'] );

if ( 'pluginzip' === $form ) {
						$plugins_page = sprintf(
							'<a href="%s">%s</a>',
							self_admin_url( 'plugin-install.php' ),
							__( 'Return to the Plugin Installer' )
						);
						wp_die( __( 'Incompatible Archive.' ) . '<br />' . $plugins_page );
					}

if ( 'themezip' === $form ) {
						$themes_page = sprintf(
							'<a href="%s" target="_parent">%s</a>',
							self_admin_url( 'theme-install.php' ),
							__( 'Return to the Theme Installer' )
						);
						wp_die( __( 'Incompatible Archive.' ) . '<br />' . $themes_page );
					}
				}
			}

$this->filename = $_FILES[ $form ]['name'];
			$this->package  = $file['file'];

// Construct the attachment array.
			$attachment = array(
				'post_title'     => $this->filename,
				'post_content'   => $file['url'],
				'post_mime_type' => $file['type'],
				'guid'           => $file['url'],
				'context'        => 'upgrader',
				'post_status'    => 'private',
			);

// Save the data.
			$this->id = wp_insert_attachment( $attachment, $file['file'] );

// Schedule a cleanup for 2 hours from now in case of failed installation.
			wp_schedule_single_event( time() + 2 * HOUR_IN_SECONDS, 'upgrader_scheduled_cleanup', array( $this->id ) );

} elseif ( is_numeric( $_GET[ $urlholder ] ) ) {
			// Numeric Package = previously uploaded file, see above.
			$this->id   = (int) $_GET[ $urlholder ];
			$attachment = get_post( $this->id );
			if ( empty( $attachment ) ) {
				wp_die( __( 'Please select a file' ) );
			}

$this->filename = $attachment->post_title;
			$this->package  = get_attached_file( $attachment->ID );
		} else {
			// Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.
			$uploads = wp_upload_dir();
			if ( ! ( $uploads && false === $uploads['error'] ) ) {
				wp_die( $uploads['error'] );
			}

$this->filename = sanitize_file_name( $_GET[ $urlholder ] );
			$this->package  = $uploads['basedir'] . '/' . $this->filename;

if ( ! str_starts_with( realpath( $this->package ), realpath( $uploads['basedir'] ) ) ) {
				wp_die( __( 'Please select a file' ) );
			}
		}
	}

/**
	 * Deletes the attachment/uploaded file.
	 *
	 * @since 3.2.2
	 *
	 * @return bool Whether the cleanup was successful.
	 */
	public function cleanup() {
		if ( $this->id ) {
			wp_delete_attachment( $this->id );

} elseif ( file_exists( $this->package ) ) {
			return @unlink( $this->package );
		}

return true;
	}
}

✅ File saved successfully!