PHP监控网站能否正常访问

<?php
header('Content-type: text/html; charset=utf-8');
$urls=array(
    'https://www.czmz.top',
    'https://czmz.top',
);
foreach ($urls as $url) {
    $resCode=getCode($url);
    if (strpos($resCode,'200')===false) {
        echo $url." 不能正常访问，错误码：".$resCode."<br/>";
    }else
    {
        echo $url." 正常访问!<br/>";
    }
}
function getCode($url)
{
    $ch = curl_init ();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_TIMEOUT, 200);
    curl_setopt($ch, CURLOPT_HEADER, FALSE);
    curl_setopt($ch, CURLOPT_NOBODY, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, FALSE);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'GET');
    curl_exec($ch);
    $httpCode = curl_getinfo($ch,CURLINFO_HTTP_CODE);
    curl_close($ch);
    return $httpCode;
}