如何从约会中减去3天？

Question

我有一个同步脚本，可将域到期日期与下一截止日期同步以进行结算。现在，如果您希望到期日期等于下一个到期日期，那么该脚本的效果很好。

但我需要下一个到期日是到期前三天，所以我需要的代码在下面的代码片段从$expirydate减去3天（完整的脚本代码如下）：

if ($SyncNextDueDate) { 
update_query ("tbldomains", array ("nextduedate" => $expirydate), array ("domain" => $domainname)); 
} 

全码：

<?php 

require dirname (__FILE__) . '/../../../dbconnect.php'; 
require ROOTDIR . '/includes/functions.php'; 
require ROOTDIR . '/includes/registrarfunctions.php'; 

$cronreport = 'Internet.bs Domain Sync Report<br> 
---------------------------------------------------<br> 
'; 
/** 
* gets expiration date from domain list command 
* @param string $data - command TEXT response 
* @return array - associative array having as key the domain name and as value the expiration date 
*/ 
function parseResult($data) { 
$result = array(); 
$data=strtolower($data); 
$arr = explode ("\n", $data); 
$totalDomains = 0; 
$assocArr = array(); 
foreach ($arr as $str) { 
    list ($varName, $value) = explode ("=", $str); 
    $varName = trim ($varName); 
    $value = trim ($value); 
    if ($varName == "domaincount") { 
     $totalDomains = intval ($value); 
    } 
    $assocArr [$varName] = $value; 

} 
if ($assocArr ["status"] != "success") { 
    return false; 
} 

for($i = 0; $i < $totalDomains; $i ++) { 
    list ($y, $m, $d) = explode ("/", $assocArr ["domain_" . $i . "_expiration"]); 
    $status = strtolower ($assocArr ["domain_" . $i . "_status"]); 
      if(!is_numeric($y) || !is_numeric($m) || !is_numeric($d)){ 
       $ddat = array ("expiry" => null, "status" => $status); 
      } else { 
       $ddat = array ("expiry" => mktime (0, 0, 0, $m, $d, $y), "status" => $status); 
      } 
    $result [strtolower ($assocArr ["domain_" . $i . "_name"])] = $ddat; 
    if (isset ($assocArr ["domain_" . $i . "_punycode"])) { 
     $result [strtolower ($assocArr ["domain_" . $i . "_punycode"])] = $ddat; 
    } 
} 
return $result; 
} 

$params = getregistrarconfigoptions ('internetbs'); 

$postfields = array(); 
$postfields ['ApiKey'] = $params ['Username']; 
$postfields ['Password'] = $params ['Password']; 
$postfields ['ResponseFormat'] = 'TEXT'; 
$postfields ['CompactList'] = 'no'; 
$testMode = trim(strtolower($params ['TestMode']))==="on"; 
$SyncNextDueDate = trim(strtolower($params ["SyncNextDueDate"]))==="on"; 

if ($testMode) { 
$url = 'https://testapi.internet.bs/domain/list'; 
} else { 
$url = 'https://api.internet.bs/domain/list'; 
} 

$ch = curl_init(); 
curl_setopt ($ch, CURLOPT_URL, $url); 

curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, FALSE); 
curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0); 

curl_setopt ($ch, CURLOPT_HEADER, 0); 
curl_setopt ($ch, CURLOPT_USERAGENT, "WHMCS Internet.bs Corp. Expiry Sync Robot"); 
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); 
curl_setopt ($ch, CURLOPT_POST, 1); 
curl_setopt ($ch, CURLOPT_POSTFIELDS, $postfields); 

$data = curl_exec ($ch); 
$curl_err = false; 


    if (curl_error ($ch)) { 
    $curl_err = 'CURL Error: ' . curl_errno ($ch) . ' - ' . curl_error ($ch); 
    exit ('CURL Error: ' . curl_errno ($ch) . ' - ' . curl_error ($ch)); 
    } 
    curl_close ($ch); 
    if ($curl_err) { 
     $cronreport .= "Error connecting to API: $curl_err"; 
    } else { 

    $result = parseResult ($data); 
    if (! $result) { 
     $cronreport .= "Error connecting to API:<br>" . nl2br ($data) . "<br>"; 
    } else { 
     $queryresult = select_query ("tbldomains", "domain", "registrar='internetbs' AND (status='Pending Transfer' OR status='Active')"); 
     while ($data = mysql_fetch_array ($queryresult)) { 
      $domainname = trim (strtolower ($data ['domain'])); 
      if (isset ($result [$domainname])) { 
           if(!is_null($result [$domainname] ["expiry"])){ 
            $expirydate = date ("Y-m-d", $result [$domainname] ["expiry"]); 
           } else { 
            $expirydate = false; 
           } 
       $status = $result [$domainname] ["status"]; 
       if ($status == 'ok') { 
        update_query ("tbldomains", array ("status" => "Active"), array ("domain" => $domainname)); 
       } 
       if ($expirydate) { 
        update_query ("tbldomains", array ("expirydate" => $expirydate), array ("domain" => $domainname)); 
        if ($SyncNextDueDate) { 
         update_query ("tbldomains", array ("nextduedate" => $expirydate), array ("domain" => $domainname)); 
        } 
        $cronreport .= '' . 'Updated ' . $domainname . ' expiry to ' . frommysqldate ($expirydate) . '<br>'; 
       } 
      } else { 
       $cronreport .= '' . 'ERROR: ' . $domainname . ' - Domain does not appear in the account at Internet.bs.<br>'; 
      } 
     } 
    } 
} 
logactivity ('Internet.bs Domain Sync Run'); 
sendadminnotification ('system', 'WHMCS Internet.bs Domain Syncronisation Report', $cronreport); 

?> 

Answer 1

$date = new DateTime($expirydate); 
$date->sub(new DateInterval('P3D'); 
$expirydate = $date->format('Y-m-d'); 

或作为一衬垫：

$expirydate = (new DateTime($expirydate))->sub(new DateInterval('P3D'))->format('Y-m-d'); 

这里有一个稍微不同的方法：

$date = new DateTime($expirydate); 
$date->modify('-3 days'); 
$expirydate = $date->format('Y-m-d');