检测重复标题-Wordpress XMLRPC

我用下面的代码发布到wordpress

<?php
define( 'XMLRPC_REQUEST', true );
$_COOKIE = array();
PHPCompatibility.Variables.RemovedPredefinedGlobalVariables.http_raw_post_dataDeprecatedRemoved
if ( ! isset( $HTTP_RAW_POST_DATA ) ) {
$HTTP_RAW_POST_DATA = file_get_contents( 'php://input' );
}
'<?xml' isn't on the very first line.
if ( isset( $HTTP_RAW_POST_DATA ) ) {
$HTTP_RAW_POST_DATA = trim( $HTTP_RAW_POST_DATA );
}
require_once __DIR__ . '/wp-load.php';
if ( isset( $_GET['rsd'] ) ) { // http://cyber.law.harvard.edu/blogs/gems/tech/rsd.html
header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ), true );
echo '<?xml version="1.0" encoding="' . get_option( 'blog_charset' ) . '"?' . '>';
?>

<?php
exit;
}

require_once ABSPATH . 'wp-admin/includes/admin.php';
require_once ABSPATH . WPINC . '/class-IXR.php';
require_once ABSPATH . WPINC . '/class-wp-xmlrpc-server.php';


$post_default_title = '';


$wp_xmlrpc_server_class = apply_filters( 'wp_xmlrpc_server_class', 'wp_xmlrpc_server' );
$wp_xmlrpc_server       = new $wp_xmlrpc_server_class;


$wp_xmlrpc_server->serve_request();

exit;


function logIO( $io, $msg ) { // phpcs:ignore 
WordPress.NamingConventions.ValidFunctionName.FunctionNameInvalid
_deprecated_function( __FUNCTION__, '3.4.0', 'error_log()' );
if ( ! empty( $GLOBALS['xmlrpc_logging'] ) ) {
    error_log( $io . ' - ' . $msg );
}
}