install_insertData_theme.inc.php

<?php
 
// replace theme_default
require_once dirname( __DIR__ ) . '/wizards/install_insertData.inc.php';
 
$available_themes = [];
foreach ( $_POST as $key => $value ) {
    if ( preg_match( '/^option_themes_\d+$/', $key ) && preg_match( '/^\w+$/', $value ) ) {
        $available_themes[] = $value;
    }
}
if ( empty( $available_themes ) ) {
    $available_themes = [ 'xcl_default', 'bs5-starter' ]; // !Todo Theme boilerplate, , 'xcl-darkmode'
}
 
$default_theme = 'xcl_default';
if ( isset( $_POST['default_theme'] ) && preg_match( "/^\w+$/", $_POST['default_theme'] ) ) {
    $default_theme = $_POST['default_theme'];
    if ( ! in_array( $default_theme, $available_themes, true ) ) {
        $available_themes[] = $default_theme;
    }
}
 
$hd_query = [
    sprintf( 'update %s set conf_value="%s" where conf_name="theme_set" limit 1',
        $dbm->db->prefix( 'config' ), $default_theme ),
    sprintf( 'update %s set conf_value=\'%s\' where conf_name="theme_set_allowed" limit 1',
        $dbm->db->prefix( 'config' ), serialize( $available_themes ) ),
    sprintf( 'update %s set theme="%s" where uid =1 limit 1',
        $dbm->db->prefix( 'users' ), '' ),
];
 
foreach ( $hd_query as $hd_sql ) {
    $result = $dbm->query( $hd_sql );
}