WordPress 4.4以后的版本对中文用户名不友好,所以我借鉴了wp-includes/formatting.php中sanitize_user函数的写法,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 mobantu_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\', \'mobantu_sanitize_user\', 10, 3);

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