Php 如何按键比较两个关联数组
我试图比较两个关联数组,并根据值和键获得差异。我尝试过使用带有闭包的数组过滤器 这两个阵列如下所示: 阵列1Php 如何按键比较两个关联数组,php,arrays,associative-array,Php,Arrays,Associative Array,我试图比较两个关联数组,并根据值和键获得差异。我尝试过使用带有闭包的数组过滤器 这两个阵列如下所示: 阵列1 $newArr = [ 0 => [ 'id' => 'UT5', 'qty' => '4' ], 1 => [ 'id' => 'WRO', 'qty' => '3' ], 2 => [ 'id' => 'SHO',
$newArr = [
0 => [
'id' => 'UT5',
'qty' => '4'
],
1 => [
'id' => 'WRO',
'qty' => '3'
],
2 => [
'id' => 'SHO',
'qty' => '3'
]
];
阵列2
$oldArr = [
0 => [
'id' => 'SHO',
'qty' => '1'
],
1 => [
'id' => 'UT5',
'qty' => '2'
],
];
我想要的输出如下:
array(3)
{
["UT5"]=> int(2)
["SHO"]=> int(2)
["WRO"]=> int(3)
}
array(2) {
["UT5"]=> int(2)
["SHO"]=> int(2)
}
我已经走了这么远:
<?php
$newArr = [
0 => [
'id' => 'UT5',
'qty' => '4'
],
1 => [
'id' => 'WRO',
'qty' => '3'
],
2 => [
'id' => 'SHO',
'qty' => '3'
]
];
$oldArr = [
0 => [
'id' => 'SHO',
'qty' => '1'
],
1 => [
'id' => 'UT5',
'qty' => '2'
],
];
$toAdd = [];
foreach ($newArr as $item) {
$itemsToAdd = array_walk($oldArr, function ($k) use ($item, &$toAdd) {
if ($k['id'] == $item['id']) {
$toAdd[$k['id']] = max($k['qty'], $item['qty']) - min($k['qty'], $item['qty']);
}
});
}
var_dump($toAdd); die();
请注意,缺少WRO。有没有一种方法,我可以添加一个条件,以准确地检查这一点?我已经尝试了一些解决方案,例如!in_数组和else都没有提供所需的输出
感谢您的帮助!谢谢 这很简单,只有在两个数组中都存在密钥时,代码才会保存一个值。只需添加一个子句来检查旧数组中是否不存在密钥。(如果旧数组有一个键而新数组没有,也要执行相反的操作) 你的程序结构是为计算机优化的,太复杂了,作为一个人,我完全重写了它
<?php
$newArr = [0 => ['id' => 'UT5', 'qty' => '4'], 1 => ['id' => 'WRO', 'qty' => '3'], 2 => ['id' => 'SHO', 'qty' => '3']];
$oldArr = [0 => ['id' => 'SHO', 'qty' => '1'], 1 => ['id' => 'UT5', 'qty' => '2'], ];
$newReset = [];
foreach( $newArr as $item ) {
$newReset[$item['id']] = $item['qty'];
}
$oldReset = [];
foreach( $oldArr as $item ) {
$oldReset[$item['id']] = $item['qty'];
}
foreach( $newReset as $key => $val ) {
if( isset( $oldReset[$key] ) ) {
$toAdd[$key] = max( $oldReset[$key], $val ) - min( $oldReset[$key], $val );
}
else $toAdd[$key] = intval($val);
}
var_dump( $toAdd );
这很简单,只有在两个数组中都存在密钥时,代码才会保存一个值。只需添加一个子句来检查旧数组中是否不存在密钥。(如果旧数组有一个键而新数组没有,也要执行相反的操作) 你的程序结构是为计算机优化的,太复杂了,作为一个人,我完全重写了它
<?php
$newArr = [0 => ['id' => 'UT5', 'qty' => '4'], 1 => ['id' => 'WRO', 'qty' => '3'], 2 => ['id' => 'SHO', 'qty' => '3']];
$oldArr = [0 => ['id' => 'SHO', 'qty' => '1'], 1 => ['id' => 'UT5', 'qty' => '2'], ];
$newReset = [];
foreach( $newArr as $item ) {
$newReset[$item['id']] = $item['qty'];
}
$oldReset = [];
foreach( $oldArr as $item ) {
$oldReset[$item['id']] = $item['qty'];
}
foreach( $newReset as $key => $val ) {
if( isset( $oldReset[$key] ) ) {
$toAdd[$key] = max( $oldReset[$key], $val ) - min( $oldReset[$key], $val );
}
else $toAdd[$key] = intval($val);
}
var_dump( $toAdd );
一次成功
$toAdd = [];
foreach ($newArr as $item)
$toAdd[$item['id']] = $item['qty'];
foreach ($oldArr as $item)
if (isset($toAdd[$item['id']]))
$toAdd[$item['id']] = abs($toAdd[$item['id']] - $item['qty']);
else
$toAdd[$item['id']] = abs($item['qty']);
print_r($toAdd);
一次成功
$toAdd = [];
foreach ($newArr as $item)
$toAdd[$item['id']] = $item['qty'];
foreach ($oldArr as $item)
if (isset($toAdd[$item['id']]))
$toAdd[$item['id']] = abs($toAdd[$item['id']] - $item['qty']);
else
$toAdd[$item['id']] = abs($item['qty']);
print_r($toAdd);
如果(!array_key_存在($item['id'],$oldArr)){$toAdd[$item['id']]=$item['qty'];}我尝试过添加其他,如果(!array_key_存在($item['id'],$oldArr)){$toAdd[$item['id']]]=$item['qty'];}我尝试过添加其他,谢谢!我明白你的逻辑,但是我已经对闭包做了如下修改:
else如果(!isset($oldArr[$item['id']]){$toAdd[$item['id']]=$item['qty'];}}});}代码>和我的输出仍然不正确(注意SHO的值应该是int(2))而不是“3”:array(3){[“UT5”]=>int(2)[“WRO”]=>string(1)“3”[“SHO”]=>string(1)“3”}
谢谢!我明白你的逻辑,但是我已经对闭包做了如下修改:else如果(!isset($oldArr[$item['id']]){$toAdd[$item['id']]=$item['qty'];}}});}代码>和我的输出仍然不正确(注意SHO的值应该是int(2)),而不是“3”:array(3){[“UT5”]=>int(2)[“WRO”]=>string(1)“3”[“SHO”]=>string(1)“3”}