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<?php
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/**
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* Plugin Name: Child Theme Wizard
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* Plugin URI: https://wpguru.tv
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* Description: Creates a child theme from any installed parent theme.
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* Version: 1.5
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* Author: Jay Versluis
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* Author URI: https://wpguru.tv
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* License: GPL2
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* License URI: http://www.gnu.org/licenses/gpl-2.0.html
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* Text Domain: child-theme-wizard
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*/
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/* Copyright 2013-2026 Jay Versluis (email support@wpguru.tv)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2, as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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add_action( 'admin_menu', 'ctw_menu' );
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function ctw_menu(): void {
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add_submenu_page(
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'tools.php',
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__( 'Child Theme Wizard', 'child-theme-wizard' ),
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__( 'Child Theme Wizard', 'child-theme-wizard' ),
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'manage_options',
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'ChildThemeWizard',
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'ctw_main_function'
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);
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}
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function ctw_main_function(): void {
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if ( ! current_user_can( 'manage_options' ) ) {
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wp_die( esc_html__( 'You do not have sufficient privileges to access this page.', 'child-theme-wizard' ) );
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}
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?>
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<div class="wrap">
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<h1><?php esc_html_e( 'Child Theme Wizard', 'child-theme-wizard' ); ?></h1>
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<?php
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if ( isset( $_POST['hiddenfield'] ) && $_POST['hiddenfield'] === 'Y' ) {
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// Verify nonce — blocks CSRF attacks.
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check_admin_referer( 'ctw_create_child_theme', 'ctw_nonce' );
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// Validate parent against actually-installed parent themes.
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$parent_themes = ctw_giveme_parents();
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$valid_parents = array_map( fn( $t ) => $t->get_stylesheet(), $parent_themes );
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$submitted_parent = sanitize_text_field( wp_unslash( $_POST['parent'] ?? '' ) );
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if ( ! in_array( $submitted_parent, $valid_parents, true ) ) {
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wp_die( esc_html__( 'Invalid parent theme selected.', 'child-theme-wizard' ) );
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}
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$newchildtheme = array(
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'parent' => $submitted_parent,
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'title' => sanitize_text_field( wp_unslash( $_POST['title'] ?? '' ) ),
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'description' => sanitize_text_field( wp_unslash( $_POST['description'] ?? '' ) ),
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'url' => esc_url_raw( wp_unslash( $_POST['url'] ?? '' ) ),
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'author' => sanitize_text_field( wp_unslash( $_POST['author'] ?? '' ) ),
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'author-url' => esc_url_raw( wp_unslash( $_POST['author-url'] ?? '' ) ),
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'version' => sanitize_text_field( wp_unslash( $_POST['version'] ?? '' ) ),
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'include-gpl' => ( isset( $_POST['include-gpl'] ) && $_POST['include-gpl'] === 'on' ) ? 'on' : 'off',
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);
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$status = ctw_create_theme( $newchildtheme );
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if ( $status['alert'] === -1 ) {
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?>
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<div class="notice notice-error">
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<p><strong><?php esc_html_e( 'Yikes — something went wrong:', 'child-theme-wizard' ); ?></strong></p>
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<?php echo wp_kses_post( $status['message'] ); ?>
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</div>
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<p><a href="<?php echo esc_url( admin_url( 'tools.php?page=ChildThemeWizard' ) ); ?>"><?php esc_html_e( 'Try again?', 'child-theme-wizard' ); ?></a></p>
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<?php
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} else {
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?>
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<div class="notice notice-success">
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<?php echo wp_kses_post( $status['message'] ); ?>
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<p><strong><?php esc_html_e( 'Your Child Theme was created successfully!', 'child-theme-wizard' ); ?></strong></p>
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</div>
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<p>
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<?php
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printf(
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/* translators: 1: link to Appearance > Themes, 2: link to Appearance > Editor */
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esc_html__( 'Head over to %1$s to activate it. Add your custom styles in %2$s.', 'child-theme-wizard' ),
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'<a href="' . esc_url( admin_url( 'themes.php' ) ) . '">' . esc_html__( 'Appearance › Themes', 'child-theme-wizard' ) . '</a>',
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'<a href="' . esc_url( admin_url( 'theme-editor.php' ) ) . '">' . esc_html__( 'Appearance › Editor', 'child-theme-wizard' ) . '</a>'
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);
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?>
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</p>
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<?php
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}
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} else {
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$current_user = wp_get_current_user();
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$parent_themes = ctw_giveme_parents();
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$current_theme = wp_get_theme();
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?>
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<p>
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<?php
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printf(
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/* translators: %s: link to WordPress child theme documentation */
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esc_html__( 'This simple wizard will help you generate a new %s with just one click.', 'child-theme-wizard' ),
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'<a href="https://developer.wordpress.org/themes/advanced-topics/child-themes/" target="_blank">' . esc_html__( 'Child Theme', 'child-theme-wizard' ) . '</a>'
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);
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?>
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</p>
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<p><?php esc_html_e( 'Select which theme you want to use as a base, fill in the details and click "Create Child Theme".', 'child-theme-wizard' ); ?></p>
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<hr>
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<form name="ctwform" method="post" action="">
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<?php wp_nonce_field( 'ctw_create_child_theme', 'ctw_nonce' ); ?>
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<input type="hidden" name="hiddenfield" value="Y">
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<table class="form-table" role="presentation">
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<tr>
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<th scope="row"><label for="ctw-parent"><?php esc_html_e( 'Parent Theme', 'child-theme-wizard' ); ?></label></th>
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<td>
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<select name="parent" id="ctw-parent">
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<?php foreach ( $parent_themes as $theme ) :
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$stylesheet = $theme->get_stylesheet();
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$name = $theme->get( 'Name' );
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$is_active = $current_theme->get( 'Name' ) === $name;
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?>
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<option value="<?php echo esc_attr( $stylesheet ); ?>"<?php selected( $is_active ); ?>>
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<?php
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echo esc_html( $name );
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if ( $is_active ) {
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echo ' (' . esc_html__( 'currently active', 'child-theme-wizard' ) . ')';
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}
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?>
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</option>
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<?php endforeach; ?>
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</select>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-title"><?php esc_html_e( 'Title', 'child-theme-wizard' ); ?></label></th>
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<td>
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<input type="text" name="title" id="ctw-title" value="" class="regular-text">
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<p class="description"><?php esc_html_e( "What's your new Child Theme called?", 'child-theme-wizard' ); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-description"><?php esc_html_e( 'Description', 'child-theme-wizard' ); ?></label></th>
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<td>
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<input type="text" name="description" id="ctw-description" value="" class="regular-text">
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<p class="description"><?php esc_html_e( 'A few notes about your Child Theme.', 'child-theme-wizard' ); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-url"><?php esc_html_e( 'Child Theme URL', 'child-theme-wizard' ); ?></label></th>
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<td>
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<input type="url" name="url" id="ctw-url" value="" class="regular-text">
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<p class="description"><?php esc_html_e( 'Does it have a website or release post?', 'child-theme-wizard' ); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-author"><?php esc_html_e( 'Author', 'child-theme-wizard' ); ?></label></th>
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<td>
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<input type="text" name="author" id="ctw-author" value="<?php echo esc_attr( $current_user->display_name ); ?>" class="regular-text">
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<p class="description"><?php esc_html_e( "That's you.", 'child-theme-wizard' ); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-author-url"><?php esc_html_e( 'Author URL', 'child-theme-wizard' ); ?></label></th>
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<td>
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<input type="url" name="author-url" id="ctw-author-url" value="<?php echo esc_url( $current_user->user_url ); ?>" class="regular-text">
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<p class="description"><?php esc_html_e( "That's your website.", 'child-theme-wizard' ); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-version"><?php esc_html_e( 'Version', 'child-theme-wizard' ); ?></label></th>
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<td>
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<input type="text" name="version" id="ctw-version" value="1.0" class="small-text">
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<p class="description"><?php esc_html_e( 'Start with 1.0 and work your way up.', 'child-theme-wizard' ); ?></p>
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</td>
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</tr>
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<tr>
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<th scope="row"><label for="ctw-include-gpl"><?php esc_html_e( 'Include GPL License', 'child-theme-wizard' ); ?></label></th>
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<td>
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<select name="include-gpl" id="ctw-include-gpl">
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<option value="on"><?php esc_html_e( 'Yes Please!', 'child-theme-wizard' ); ?></option>
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<option value="off"><?php esc_html_e( 'No Thanks', 'child-theme-wizard' ); ?></option>
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</select>
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</td>
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</tr>
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</table>
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<p class="submit">
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<input type="submit" name="Submit" class="button-primary" value="<?php esc_attr_e( 'Create Child Theme', 'child-theme-wizard' ); ?>">
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</p>
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</form>
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<?php
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}
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?>
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<br><hr><br>
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</div><!-- .wrap -->
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<p><a href="https://wpguru.co.uk" target="_blank"><img src="<?php echo esc_url( plugins_url( 'images/guru-header-2013.png', __FILE__ ) ); ?>" width="300" alt="WP Guru"></a></p>
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<p>
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<a href="https://wpguru.co.uk/2014/03/introducing-child-theme-wizard-for-wordpress/" target="_blank">Plugin by Jay Versluis</a>
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| <a href="https://github.com/versluis/Child-Theme-Wizard" target="_blank">Fork me or Contribute on GitHub</a>
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| <a href="https://patreon.com/versluis" target="_blank">Support me on Patreon</a>
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</p>
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<?php
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}
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function ctw_create_theme( array $childtheme ): array {
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$status = array(
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'alert' => 0,
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'message' => '',
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);
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global $wp_filesystem;
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if ( empty( $wp_filesystem ) ) {
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require_once ABSPATH . 'wp-admin/includes/file.php';
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WP_Filesystem();
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}
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$directory = get_theme_root() . '/' . sanitize_file_name( $childtheme['title'] );
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if ( ! $wp_filesystem->mkdir( $directory ) ) {
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$status['message'] = '<p>' . esc_html__( 'Could not create directory. Does it exist already?', 'child-theme-wizard' ) . '</p>';
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$status['alert'] = -1;
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return $status;
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}
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$status['message'] .= '<p>' . esc_html__( 'Directory created successfully.', 'child-theme-wizard' ) . '</p>';
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// Strip */ so user-supplied values cannot break out of the CSS comment block.
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$safe = array_map( fn( $v ) => str_replace( '*/', '', (string) $v ), $childtheme );
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$style = "/* \n Theme Name: " . $safe['title'];
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$style .= "\n Theme URI: " . $safe['url'];
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$style .= "\n Description: " . $safe['description'];
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$style .= "\n Author: " . $safe['author'];
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$style .= "\n Author URI: " . $safe['author-url'];
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$style .= "\n Template: " . $safe['parent'];
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$style .= "\n Version: " . $safe['version'];
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if ( $safe['include-gpl'] === 'on' ) {
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$style .= "\n License: GNU General Public License v2 or later";
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$style .= "\n License URI: http://www.gnu.org/licenses/gpl-2.0.html";
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}
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$style .= "\n\n /* == Add your own styles below this line ==";
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$style .= "\n--------------------------------------------*/\n\n";
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if ( ! $wp_filesystem->put_contents( $directory . '/style.css', $style, FS_CHMOD_FILE ) ) {
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$status['message'] .= '<p>' . esc_html__( 'There was a problem writing data to style.css.', 'child-theme-wizard' ) . '</p>';
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$status['alert'] = -1;
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return $status;
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}
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$status['message'] .= '<p>' . esc_html__( 'Writing data to style.css…', 'child-theme-wizard' ) . '</p>';
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$functions = "<?php\n/*\n\n This file is part of a child theme called " . $safe['title'] . ".";
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$functions .= "\n Functions in this file will be loaded before the parent theme's functions.";
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$functions .= "\n For more information, please read";
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$functions .= "\n https://developer.wordpress.org/themes/advanced-topics/child-themes/";
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$functions .= "\n\n*/\n\n";
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$functions .= "// Loads the parent stylesheet — leave this in place unless you know what you're doing.\n";
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$functions .= "function your_theme_enqueue_styles() {\n\n";
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$functions .= " \$parent_style = 'parent-style';\n\n";
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$functions .= " wp_enqueue_style( \$parent_style,\n";
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$functions .= " get_template_directory_uri() . '/style.css'\n";
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$functions .= " );\n\n";
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$functions .= " wp_enqueue_style( 'child-style',\n";
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$functions .= " get_stylesheet_directory_uri() . '/style.css',\n";
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$functions .= " array( \$parent_style ),\n";
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$functions .= " wp_get_theme()->get( 'Version' )\n";
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$functions .= " );\n";
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$functions .= "}\n";
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$functions .= "add_action( 'wp_enqueue_scripts', 'your_theme_enqueue_styles' );\n\n";
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$functions .= "/* Add your own functions below this line.\n";
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$functions .= " ======================================== */\n\n";
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if ( ! $wp_filesystem->put_contents( $directory . '/functions.php', $functions, FS_CHMOD_FILE ) ) {
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$status['message'] .= '<p>' . esc_html__( 'There was a problem writing data to functions.php.', 'child-theme-wizard' ) . '</p>';
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$status['alert'] = -1;
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return $status;
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}
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$status['message'] .= '<p>' . esc_html__( 'Writing data to functions.php…', 'child-theme-wizard' ) . '</p>';
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$status['message'] .= ctw_make_thumbnail( $directory );
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return $status;
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}
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function ctw_giveme_parents(): array {
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$parent_themes = array();
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foreach ( wp_get_themes() as $theme ) {
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if ( $theme->parent() === false ) {
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$parent_themes[] = $theme;
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}
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}
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return $parent_themes;
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}
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function ctw_make_thumbnail( string $childpath ): string {
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global $wp_filesystem;
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if ( empty( $wp_filesystem ) ) {
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require_once ABSPATH . 'wp-admin/includes/file.php';
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WP_Filesystem();
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}
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$source = plugin_dir_path( __FILE__ ) . 'images/screenshot.png';
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$destination = $childpath . '/screenshot.png';
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if ( ! $wp_filesystem->copy( $source, $destination ) ) {
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return '<p>' . esc_html__( 'Could not copy thumbnail image.', 'child-theme-wizard' ) . '</p>';
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}
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return '<p>' . esc_html__( 'Copied thumbnail file — looking good!', 'child-theme-wizard' ) . '</p>';
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}
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Reference in New Issue
Block a user