Question

这是我的数组

$array = array( 0 => 10, 1 => 9, 2 => 8, 3 => 6, 4=> 4 );

我想获得数组值6.因为在此值/系列中断之前缺少7。

请帮助我如何轻松完成？快速的方法。

Answer 1

我不确定我理解你想要达到的目标，但让我们在这里开始吧。

更新：

for($i = 0; $i < count($array); ++$i) {
  if($i > 0) {
    if($array[$i] != ($array[$i-1]-1)) {
      echo($array[$i]);
      break;
    }
  }
}

输出：

Answer 2

循环播放，保存以前的值并与当前值进行比较：

<?php
function findMissing($array) {
  $missing = [];
  foreach($array as $key => $val) {
    if(isset($previousValue) && $previousValue-1!=$val) {
        echo "not in series: ".($previousValue-1) .", returning ".$val."<br>\n";
        $missing[] = $val;
    }
    $previousValue=$val;
  }
  return $missing;
}

// USAGE:

$array = array( 0 => 10, 1 => 9, 2 => 8, 3 => 6, 4=> 4 );

findMissing($array);
// not in series: 7, returning 6
// not in series: 5, returning 4

$array2 = array( 10, 9, 8, 6, 5 );

$missingValues = findMissing($array2);
// not in series: 7, returning 6

var_dump($missingValues);
// array(1) { [0]=> int(6) }

Answer 3

<?php

// Set the name for your New Sub Domain

$subDomainname = $_POST['userInput'];

// cPanel Username

$cPanelUserName = "XXXXXXXX";

// cPanel Password

$cPanelPassName = "XXXXXXXXXX";

// Main Domain Name

$rootDomainName = "XXXXXXXXXXX";

// Function to create subdomain

function create_subdomain($subDomain, $cPanelUser, $cPanelPass, $rootDomain)
    {

    // Generate URL for access the subdomain creation in cPanel through PHP

    $buildRequest = "/frontend/x3/subdomain/doadddomain.html?rootdomain=" . $rootDomain . "&domain=" . $subDomain . "&dir=public_html/subdomains/" . $subDomain;

    // Open the socket

    $openSocket = fsockopen('localhost', 2082);
    if (!$openSocket)
        {

        // SHow error

        return "Socket error";
        exit();
        }

    // Login Details

    $authString = $cPanelUser . ":" . $cPanelPass;

    // Encrypt the Login Details

    $authPass = base64_encode($authString);

    // Request to Server using GET method

    $buildHeaders = "GET " . $buildRequest . "\r\n";

    // HTTP

    $buildHeaders.= "HTTP/1.0\r\n";

    // Define Host

    $buildHeaders.= "Host:localhost\r\n";

    // Request Authorization

    $buildHeaders.= "Authorization: Basic " . $authPass . "\r\n";
    $buildHeaders.= "\r\n";

    // fputs

    fputs($openSocket, $buildHeaders);
    while (!feof($openSocket))
        {
        fgets($openSocket, 128);
        }

    fclose($openSocket);

    // Return the New SUbdomain with full URL

    $newDomain = "http://" . $subDomain . "." . $rootDomain . "/";

    // return with Message

    }

// Call the subdomain creator function

echo create_subdomain($subDomainname, $cPanelUserName, $cPanelPassName, $rootDomainName);
?>

输出：

<?php

$sequence =
[
    0 => 10,
    1 => 9,
    3 => 8,
    4 => 6,
    5 => 4
];

$last = null;
foreach($sequence as $k => $v)
{
    if(!is_null($last) && $last - $v > 1)
        break;
    $last = $v;
}
var_dump($k, $v);

Answer 4

可以通过从第二个值中减去第一个值来计算序列。然后，您可以使用for循环来遍历数组的值，并通过检查是否存在索引+ 1来检查是否还有下一个值。

然后，如果是这种情况，您可以从下一个值中减去循环中的当前值，并检查该结果是否等于步长。

如果不是这样，那么迭代的下一个值就是破坏序列的值，你可以突破循环。

$array = [10,9,8,6,4];

if (count($array) > 2) {
    $step = $array[0] - $array[1];
    for ($i = 0; $i < count($array); $i++) {
        if (isset($array[$i + 1]) && $array[$i] - $array[$i + 1] !== $step) {
            $wrongValue = $array[$i + 1];
            echo sprintf(" The step count is %d, but after %d comes %d which breaks the sequence.",
                $step, $array[$i], $wrongValue
            );
            break;
        }
    }
}

Demo

PHP - 如果下一个元素不是系列，则获取数组值

4 个答案: