怎么不修改wordpress原生文件,实现注册用户名支持中文呢?借鉴了wp-includes/formatting.php中sanitize_user函数的写法,只要将以下php代码复制到当前主题目录下的functions.php中,即可让wordpress支持使用中文用户名注册和登录:

function ludou_sanitize_user ($username, $raw_username, $strict) {
$username = wp_strip_all_tags( $raw_username );
$username = remove_accents( $username );
// Kill octets
$username = preg_replace( ‘|%([a-fA-F0-9][a-fA-F0-9])|’, ”, $username );
$username = preg_replace( ‘/&.+?;/’, ”, $username ); // Kill entities

// 网上很多教程都是直接将$strict赋值false,
// 这样会绕过字符串检查,留下隐患
if ($strict) {
$username = preg_replace (‘|[^a-z\p{Han}0-9 _.\-@]|iu’, ”, $username);
}

$username = trim( $username );
// Consolidate contiguous whitespace
$username = preg_replace( ‘|\s+|’, ‘ ‘, $username );

return $username;
}

add_filter (‘sanitize_user’, ‘ludou_sanitize_user’, 10, 3);