我有這個數組$a：[0] => Array ( [param] => banana [value] => yellow )[1] => Array ( [param] => lemon [value] => 3 )[2] => Array ( [param] => apple [value] => 18 )...和數組$b：[0] => Array ( [param] => banana [value] => brown )[1] => Array ( [param] => orange [value] => 3 )[2] => Array ( [param] => lemon [value] => 4 )[3] => Array ( [param] => pear [value] => green )Array$c應該是 的副本$a，但是，如果$b包含存在于 中的某些參數，則$afrom 的值$a應更新為 from 的值$b。所以$c會變成：[0] => Array ( [param] => banana [value] => brown )[1] => Array ( [param] => lemon [value] => 4 )[2] => Array ( [param] => apple [value] => 18 )有小費嗎？
2 回答
慕勒3428872
TA貢獻1848條經驗 獲得超6個贊
您可以將數組映射與多個數組一起使用，
$c = array_filter(array_map(function ($a1, $b1) {
if ($a1['param'] == $b1['param']) {
$a1['value'] = $b1['value'];
return $a1;
} else {
return $a1;
}
}, $a, $b));
編輯
$bData = array_column($b,'value','param'); // param as key and value as value
foreach($a as &$v){
$v['value'] = ($bData[$v['param']] ?? $v['value']); // php 7+
//or $v['value'] = (!empty($bData[$v['param']]) ? $bData[$v['param']] : $v['value']); // php 5.6 or previous
}
輸出
Array
(
[0] => Array
(
[param] => banana
[value] => brown
)
[1] => Array
(
[param] => lemon
[value] => 4
)
[2] => Array
(
[param] => apple
[value] => 18
)
)
素胚勾勒不出你
TA貢獻1827條經驗 獲得超9個贊
$a = ['banana' => 'yellow', 'apple' => 3, 'lemon' => 18];
$b = ['banana' => 'brown', 'orange' => 3, 'lemon' => 4];
$a_keys = array_keys($a);
$c = $a;
foreach ($a_keys as $key) {
if(array_key_exists($key, $b)){
$c[$key] = $b[$key];
}
}
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