利用php获取标准北京时间的方法

<?php
date_default_timezone_set('Asia/Shanghai'); // 设置时区为北京时间
echo date('Y-m-d H:i:s'); // 输出标准北京时间
?>

<?php  
$url = 'https://www.bjtimes.cc/get_bjtimes.php';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
if(curl_errno($ch)){
    echo 'cURL Error: ' . curl_error($ch);
}
curl_close($ch);
$data = json_decode($response, true);
 
if ($data && isset($data['bjtimes'])) {
    $sysTime = $data['bjtimes'];
    echo $sysTime;
} else {
    echo '同步国家授时中心时间失败…';
}
?>

<?php
$url = 'https://www.bjtimes.cc/get_bjtimes.php';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, true);
$result = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
 
if ($http_code == 200) {
    $header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
    $headers = substr($result, 0, $header_size);
    preg_match('/Last-Modified: (.*)\s/', $headers, $matches);
    if (!empty($matches[1])) {
        $last_modified = strtotime($matches[1]);
        echo 'Last Modified: ' . date('Y-m-d H:i:s', $last_modified);
    } else {
        echo 'Last Modified time not found';
    }
} else {
    echo 'Failed to open the URL';
}
?>