比较两个阵列，和array_diff [英] Comparing two arrays with array_diff

问题描述

我有以下的code，我试图比较两个阵列与和array_diff但是我一直没有得到结果。我不知道，如果它的问题，但也有许多领域数组中，我真的只是想比较1场......这可能吗？我缺少什么？

 ＆LT; PHP
$ JSON = file_get_contents(\"http://ebird.org/ws1.1/data/obs/region/recent?rtype=subnational1&r=US-AZ&back=7&fmt=json\");
$ json2 = file_get_contents(\"http://ebird.org/ws1.1/data/obs/region/recent?rtype=subnational1&r=US-NV&back=7&fmt=json\");$数组1 = json_de code（$ JSON，TRUE）;
$数组2 = json_de code（$ json2，TRUE）;如果（$数组1 == $数组2）{
回声没有区别;
}其他
后续代码var_dump（和array_diff（$数组2，$数组1））;
回声他们是不同的';？＆GT;
 

解决方案

您将需要检查阵列针对对方：

  $ Array_1 =阵列（1,2,3,4,5）;
$ Array_2 =阵列（1,2,3,4,5,6）;的print_r（和array_diff（$ Array_1，$ Array_2））;
 

将输出：

 阵列
（
）
 

鉴于：

 的print_r（和array_diff（$ Array_2，$ Array_1））;
 

将输出：

 阵列
（
    [5] =＆GT; 6
）
 

所以这可能是一个解决方案：

 函数ArrayDiff（$ Array_1，$ Array_2）{
    $ Compare_1_To_2 =和array_diff（$ Array_1，$ Array_2）;
    $ Compare_2_To_1 =和array_diff（$ Array_2，$ Array_1）;
    $ Difference_Array = array_merge（$ Compare_1_To_2，$ Compare_2_To_1）;
    返回$ Difference_Array;}的print_r（ArrayDiff（$ Array_1，$ Array_2））;
 

将输出：

 阵列
（
    [0] =＆GT; 6
）
 

---

把这个变成一个if语句：

  $ =差异ArrayDiff（$ Array_2，$ Array_1）;
如果（计数（$差异）大于0）{
    回声有阵列之间的区别：';
    的foreach（$差异$不同）{
        回声＆LT; BR＆gt;中不同$。
    }
 

所有的例子和code在开始基于该阵列（$ Array_1和$ Array_2）

I have the following code and am trying to compare two array's with array_diff however I keep getting no results. I not sure if it matters, but there are many fields in the array and I really only want to compare 1 field...is this possible? what am I missing?

<?php
$json = file_get_contents("http://ebird.org/ws1.1/data/obs/region/recent?rtype=subnational1&r=US-AZ&back=7&fmt=json");
$json2 = file_get_contents("http://ebird.org/ws1.1/data/obs/region/recent?rtype=subnational1&r=US-NV&back=7&fmt=json");

$array1 = json_decode($json, TRUE);
$array2 = json_decode($json2, TRUE);

if ( $array1 == $array2 ) {
echo 'There are no differences';
}else 
var_dump(array_diff($array2, $array1));
echo 'they are different';

?>

解决方案

You will need to check the arrays against each other:

$Array_1 = array (1,2,3,4,5);
$Array_2 = array(1,2,3,4,5,6);

print_r(array_diff($Array_1,$Array_2));

Will output:

Array
(
)

Whereas:

 print_r(array_diff($Array_2,$Array_1));

will output:

Array
(
    [5] => 6
)

So this might be a solution:

function ArrayDiff ($Array_1, $Array_2){
    $Compare_1_To_2 = array_diff($Array_1,$Array_2);
    $Compare_2_To_1 = array_diff($Array_2,$Array_1);
    $Difference_Array = array_merge($Compare_1_To_2,$Compare_2_To_1);
    return $Difference_Array;

}

print_r(ArrayDiff($Array_1,$Array_2));

Which will output:

Array
(
    [0] => 6
)

---

Putting this into an if statement:

$Differences = ArrayDiff($Array_2,$Array_1);
if (count($Differences) > 0){
    echo 'There Are Differences Between The Array:';
    foreach ($Differences AS $Different){
        echo "<br>".$Different;
    }

All the examples and code is based off the arrays at the start ($Array_1 and $Array_2)

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