如何比较关联数组？

Question

我想比较下面的两个数组并找出差异。键“主要所有者”和“公司”的值不同，但是当我比较这些数组时，它说只有“公司”值不同。但是，当我为“主要所有者”创建两个只有一个键/值对的新数组时，它可以正常工作。我是不是犯了什么错误？

<?php

$arr1 = Array
    (
        "leadid" => "418176000000069007",
        "smownerid" => "418176000000047003",
        "lead owner" => "Amit Patil",
        "company" => "SAM",
        "first name" => "Test",
        "last name" =>"Lead1",
        "designation" => "call",
        "email" => "",
        "phone" => "958",
        "fax" => "",
        "mobile" => "",
        "website" => "www.infosys.con",
        "lead source" => "Cold Call",
        "lead status" => "Contact in Future",
        "industry" => "None",
        "no of employees" => "45000",
        "annual revenue" => "0",
        "rating" => "Active",
        "smcreatorid" => "418176000000047003",
        "created by" => "Amit Patil",
        "modifiedby" => "418176000000047003",
        "modified by" => "Amit Patil",
        "created time" => "2012-04-05 19:58:00",
        "modified time" => "2012-05-02 08:51:08",
        "street" => "",
        "city" => "",
        "state" => "",
        "zip code" => "",
        "country" => "",
        "description" => "",
        "skype id" => "",
        "email opt out" => "false",
        "salutation" => "Mr.",
        "secondary email" => ""
        );

$arr2 = Array
    (
        "leadid" => "418176000000069007",
        "smownerid" => "418176000000047003",
        "lead owner" => "Amit aaa",
        "company" => "SAM A",
        "first name" => "Test",
        "last name" => "Lead1",
        "designation" => "call",
        "email" => "",
        "phone" => "958",
        "fax" => "",
        "mobile" => "",
        "website" => "www.infosys.con",
        "lead_source" => "Cold Call",
        "lead_status" => "Contact in Future",
        "industry" => "None",
        "no_of_employees" => "45000",
        "annual_revenue" => "0",
        "rating" => "Active",
        "smcreatorid" => "418176000000047003",
        "created_by" => "Amit Patil",
        "modifiedby" => "418176000000047003",
        "modified_by" => "Amit Patil",
        "created_time" => "2012-04-05 19:58:00",
        "modified_time" => "2012-05-02 08:51:08",
        "street" => "",
        "city" => "",
        "state" => "",
        "zip_code" => "0",
        "country" => "",
        "description" => "",
        "skype_id" => "",
        "email_opt_out" => "false",
        "salutation" => "Mr.",
        "secondary_email" => ""
        );

$arr3 = array("lead owner" => "Amit Patil");
$arr4 = array("lead owner" => "Amit aaa");

print_r(array_diff($arr1,$arr2));
echo "<br>";
print_r(array_diff($arr3,$arr4));
?>

输出如下

Array ( [company] => SAM )
Array ( [lead owner] => Amit Patil ) 

Answer 1

如果您想在关联数组之间进行比较，以便键值对重要，而不仅仅是值，请使用

array_diff_assoc

，而不是

array_diff

。

Answer 2

你理解错了。

array_diff的文档页面说

返回一个数组，其中包含 array1 中不存在的所有条目 存在于任何其他数组中。

但是

Amit Patil

存在于第二个数组中，因此它仅返回一个值

SAM

并且它只是第二个数组中不存在的一个值。

Answer 3

array_diff()

返回互补值。所以你可以这样做：

   array_diff(array_merge($arr1, $arr2), array_intersect($arr1, $arr2));

这样就可以了。

Answer 4

发生这种情况是因为“array_diff”函数返回第一个数组中任何键出现的值，而第二个数组中没有任何键出现的值。

lead_owner“Amit Patil”不等于第二个数组的lead_owner，但等于第二个数组的created_by和modified_by键。

为此目的，您应该使用“array_diff_assoc”。

Answer 5

尝试一下，看看，这应该有效

print_r(array_diff_assoc($arr1,$arr2));
echo "<br>";
print_r(array_diff_assoc($arr3,$arr4));