Question

我有两个数组，一个包含人名，另一个包含人名。

$firstname = array ( "John", "Tom", "Ben", "John", "David", "Julie", "David");
$lastname = array ( "Kennedy", "Hyde", "Hughes", "Harper" "Walter", "Weber", "Walter");

人名和姓在两个阵列中都有相同的索引（John Kennedy，Tom Hyde等）我正在寻找一种在数组$firstname中找到重复值的方法是两个约翰和两个戴维斯，但是如果它们也是重复的话，我需要用相同的索引检查$lastname，因此输出将是David Harper, David Harper。

该数组可包含大约50多个不同的名称和姓氏。

在互联网上找不到任何内容，而且我的想法已经用完，任何帮助都将不胜感激。

Answer 1

您必须创建一个处理结果值的第三个数组，即全名。以下示例将返回两个数组，duplicates数组和fullnames数组，没有重复：

    <?php

$firstname = array ( "John", "Tom", "Ben", "John", "David", "Julie", "David");
$lastname = array ("Kennedy", "Hyde", "Hughes", "Harper", "Walter", "Weber", "Walter");
$fullname = array();
$duplicates = array();

// foreach time we have a first name.
for ($i =0; $i < count($firstname); $i++){
    $fullname_tmp = $firstname[$i]." ".$lastname[$i];
    if (in_array($fullname_tmp, $fullname)){
        if (in_array($fullname_tmp, $duplicates)){
            $duplicates[] = $fullname_tmp;
        }
        else{
            $duplicates[] = $fullname_tmp;
            $duplicates[] = $fullname_tmp;
        }

    }
    else{
        $fullname[] = $fullname_tmp;
    }
}

echo "<pre>\n duplicates \n";

print_r($duplicates);

echo "\n full names \n";

print_r($fullname);

示例使用in_array和简单的for循环。

结帐DEMO

Answer 2

简单的array_unique会解决你的问题吗？

$firstname = array ( "John", "Tom", "Ben", "John", "David", "Julie", "David");
$lastname = array ( "Kennedy", "Hyde", "Hughes", "Harper", "Walter", "Weber", "Walter");
var_dump(array_unique($firstname));
var_dump(array_unique($lastname));

输出将是

array (size=5)
  0 => string 'John' (length=4)
  1 => string 'Tom' (length=3)
  2 => string 'Ben' (length=3)
  4 => string 'David' (length=5)
  5 => string 'Julie' (length=5)
array (size=6)
  0 => string 'Kennedy' (length=7)
  1 => string 'Hyde' (length=4)
  2 => string 'Hughes' (length=6)
  3 => string 'Harper' (length=6)
  4 => string 'Walter' (length=6)
  5 => string 'Weber' (length=5)

PHP：检查两个数组是否有重复值

2 个答案: