一個(gè)網(wǎng)站運(yùn)行時(shí)間長(zhǎng)了，難免會(huì)出現(xiàn) 404 頁(yè)面，404 頁(yè)面會(huì)給用戶留下不好的印象，影響用戶體驗(yàn)，如果我們能及時(shí)發(fā)現(xiàn) 404 頁(yè)面，并很快修復(fù)，用戶就會(huì)覺(jué)得我們的網(wǎng)站很靠譜，同時(shí)也有助于提升網(wǎng)站的 SEO 友好度。下面的代碼可以在 WordPress 出現(xiàn) 404 頁(yè)面時(shí)，通過(guò)郵件通知網(wǎng)站管理員。

// 網(wǎng)站信息
$blog  = get_bloginfo('name');
$site  = get_bloginfo('url') . '/';
$email = get_bloginfo('admin_email');
// 主題信息
if (!empty($_COOKIE[nkthemeswitch . COOKIEHASH])) {
	$theme = clean($_COOKIE[nkthemeswitch . COOKIEHASH]);
} else {
	$theme_data = wp_get_theme();
	$theme = clean($theme_data->Name);
}
// 來(lái)源網(wǎng)址
if (isset($_SERVER['HTTP_REFERER'])) {
	$referer = clean($_SERVER['HTTP_REFERER']);
} else {
	$referer = undefined;
}
// 請(qǐng)求 URI
if (isset($_SERVER['REQUEST_URI']) && isset($_SERVER[HTTP_HOST])) {
	$request = clean('http://' . $_SERVER[HTTP_HOST] . $_SERVER[REQUEST_URI]);
} else {
	$request = undefined;
}
// 請(qǐng)求字符串
if (isset($_SERVER['QUERY_STRING'])) {
	$string = clean($_SERVER['QUERY_STRING']);
} else {
	$string = undefined;
}
// 用戶的IP 地址
if (isset($_SERVER['REMOTE_ADDR'])) {
	$address = clean($_SERVER['REMOTE_ADDR']);
} else {
	$address = undefined;
}
// user agent
if (isset($_SERVER['HTTP_USER_AGENT'])) {
	$agent = clean($_SERVER['HTTP_USER_AGENT']);
} else {
	$agent = undefined;
}
// 用戶識(shí)別碼
if (isset($_SERVER['REMOTE_IDENT'])) {
	$remote = clean($_SERVER['REMOTE_IDENT']);
} else {
	$remote = undefined;
}
// 記錄時(shí)間
$time = clean(date(F jS Y, h:ia, time()));
// 凈化數(shù)據(jù)
function clean($string) {
	$string = rtrim($string); 
	$string = ltrim($string); 
	$string = htmlentities($string, ENT_QUOTES); 
	$string = str_replace(\n, , $string);

	if (get_magic_quotes_gpc()) {
		$string = stripslashes($string);
	} 
	return $string;
}

$message = 
	TIME:             . $time    . \n . 
	*404:             . $request . \n . 
	SITE:             . $site    . \n . 
	THEME:            . $theme   . \n . 
	REFERRER:         . $referer . \n . 
	QUERY STRING:     . $string  . \n . 
	REMOTE ADDRESS:   . $address . \n . 
	REMOTE IDENTITY:  . $remote  . \n . 
	USER AGENT:       . $agent   . \n\n\n;

// 最后通過(guò)郵件發(fā)送404頁(yè)面通知信息
mail($email, 404 警告:  . $blog .  [ . $theme . ], $message, From: $email); 

把上面的代碼粘貼到 WordPress 的 functions.php 中，網(wǎng)站出現(xiàn) 404 頁(yè)面的時(shí)候管理員就可以馬上收到通知郵件，然后立即著手修復(fù)。