如何在 PHP 中比较和获取 2 个 multidim 数组之间的差异

Posted 2023-03-14

【中文标题】如何在 PHP 中比较和获取 2 个 multidim 数组之间的差异

【英文标题】：How to compare and get the difference between 2 multidim arrays in PHP

【发布时间】：2013-02-09 02:28:23

【问题描述】：

有人可以帮我解决这个问题吗？

我有 2 个数组 arr1 和 arr2

<?php
$arr1[0]['name'] = "Ben";
$arr1[0]['level'] = "3";
$arr1[0]['age'] = "10";
$arr1[0]['gender'] = "M";
$arr1[1]['name'] = "Chris";
$arr1[1]['level'] = "12";
$arr1[1]['age'] = "4";
$arr1[1]['gender'] = "F";


$arr2[0]['name'] = "Jack";
$arr2[0]['grade_level'] = "3";
$arr2[0]['age'] = "10";
$arr2[0]['gender'] = "F";
$arr2[1]['name'] = "Lily";
$arr2[1]['level'] = "2";
$arr2[1]['age'] = "7";
$arr2[1]['gender'] = "F";
$arr2[2]['name'] = "Chris";
$arr2[2]['level'] = "12";
$arr2[2]['age'] = "4";
$arr2[2]['gender'] = "M";
?>

我需要在具有相同级别和年龄值的条目上比较 arr1 和 arr2 之间的差异（反之亦然），并返回/突出显示不匹配的列。

例如： 将 arr1 中的 Ben->3->10->M 与 进行比较 A.1 arr2 中的 Jack->3->10->F 因为它们具有相同的级别和年龄值 arr1 中的 Chris->12->4->F 将与进行比较 A.2 Chris->12->4->在 arr2 中的 M 因为他们有相同的 level 和 age 值

我应该能够知道哪些列不匹配 对于 A.1，返回应该是姓名和性别 对于 A.2，返回应该是性别

期望的输出： http://s7.postimage.org/8r3tf24rf/img.png

我已经尝试了 array_diff 和几个数组函数和操作，但我无法得出想要的结果 :( 请帮忙。谢谢！

【问题讨论】：

您的示例只有两个级别。你的真实数据是真的吗？

【参考方案1】：

例如，您可以使用如下所示的“辅助数组”（$hl 荧光笔）：

<?php
$arr1[0]['name'] = "Ben";
$arr1[0]['level'] = "3";
$arr1[0]['age'] = "10";
$arr1[0]['gender'] = "M";
$arr1[1]['name'] = "Chris";
$arr1[1]['level'] = "12";
$arr1[1]['age'] = "4";
$arr1[1]['gender'] = "F";


$arr2[0]['name'] = "Jack";
$arr2[0]['level'] = "3";
$arr2[0]['age'] = "10";
$arr2[0]['gender'] = "F";
$arr2[1]['name'] = "Lily";
$arr2[1]['level'] = "2";
$arr2[1]['age'] = "7";
$arr2[1]['gender'] = "F";
$arr2[2]['name'] = "Chris";
$arr2[2]['level'] = "12";
$arr2[2]['age'] = "4";
$arr2[2]['gender'] = "M";

$hl1 = array();
$hl2 = array();

foreach($arr1 as $x => $tester)

    foreach($arr2 as $y => $testing)
    
        if(($tester['level'] == $testing['level']) AND ($tester['age'] == $testing['age']))
        
            foreach($tester as $key => $value)
            
                if($testing[$key] != $value)
                
                    $hl1[$x]['pos'] = true;
                    $hl1[$x]['key'][] = $key;
                    $hl2[$y]['pos'] = true;
                    $hl2[$y]['key'][] = $key;
                
            
        
    

$printheader = true;
echo "<table border='1'>";
foreach($arr1 as $pos => $printer)

    echo "<tr>";
    if($printheader)
    
        $header = array_keys($printer);
        foreach($header as $key)
        
            echo "<td>". $key ."</td>";
        
        echo "</tr><tr>";
        $printheader = false;
    
    foreach($printer as $key => $value)
    
        if(isset($hl1[$pos]) AND in_array($key, $hl1[$pos]['key']))
        
            echo "<td style='background-color: ff0000;'>". $value ."</td>";
        
        else
            echo "<td>". $value ."</td>";
    
    echo "</tr>";

echo "</table>";
$printheader = true;
echo "<table border='1'>";
foreach($arr2 as $pos => $printer)

    echo "<tr>";
    if($printheader)
    
        $header = array_keys($printer);
        foreach($header as $key)
        
            echo "<td>". $key ."</td>";
        
        echo "</tr><tr>";
        $printheader = false;
    
    foreach($printer as $key => $value)
    
        if(isset($hl2[$pos]) AND in_array($key, $hl2[$pos]['key']))
        
            echo "<td style='background-color: ff0000;'>". $value ."</td>";
        
        else
            echo "<td>". $value ."</td>";
    
    echo "</tr>";

echo "</table>";
?>

看起来像这样：http://anyimg.com/view/8pj5q71/table_out.png