我正在努力寻找比较以下数组的适当逻辑:
$a = [
"ip" => [
"1.2.3.4",
"4.3.2.1",
],
"domain" => [
"example.com",
"another.domain",
],
];
$b = [
[
"id"=> 136589,
"metaname" => "ip",
"metavalue" => "1.2.3.4",
],
[
"id"=> 136590,
"metaname" => "domain",
"metavalue" => "example.com",
],
];
我需要遍历 $a
来找到键('ip'
)值('1.2.3.4'
)组合$b
中不存在。在数组 $a
中,我需要捕获 ip '4.3.2.1'
和域 'another.domain'
$b
有可能具有不同键的匹配值吗?
'ip'
地址就是一个很好的例子。可能的与 IP 相关的元名称值是 'ip'
、'ip.dst'
和 'ip.src'
。回到示例数据 - 即使 'ip'
匹配,如果元名称不匹配,也应该跳过它。
foreach ($a as $metaName => $metaValues)
{
foreach ($metaValues as $metaValue)
{
foreach ($b as $row)
{
if (in_array($metaName, $row) && in_array($metaValue, $row))
{
# this pair exists, move on to next $metaName-$metaValue pair
break;
}
# this is where i am now, making small progress
# more trial and error going on
}
}
}
在我的示例代码中,注释是我需要帮助的地方。我已经尝试了不同检查和循环的各种迭代来捕获适当的数据但无济于事......
in_array($metaValue, $row)
array_keys($row, $metaValue)
结合各种 if
语句等等,但这无济于事。
如果我的描述不够清楚,下表可能会有所帮助。
+ A ---------------------+----+ B ------------------+ Comment ------------------------+
| ip, 1.2.3.4 | == | ip, 1.2.3.4 | Skip, no more checks |
+------------------------+----+---------------------+---------------------------------+
| ip, 4.3.2.1 | != | ip, 1.2.3.4 | Keep checking |
| | != | domain, example.com | No more B to compare, I want A! |
+------------------------+----+---------------------+---------------------------------+
| domain, example.com | != | ip, 1.2.3.4 | Keep checking |
| | == | domain, example.com | Skip, no more checks |
+------------------------+----+---------------------+---------------------------------+
| domain, another.domain | != | ip, 1.2.3.4 | Keep checking |
| | != | domain, example.com | No more B to compare, I want A! |
+------------------------+----+---------------------+---------------------------------+
最佳答案
只需稍作修改并使用 reference你很接近。但是要小心第一个 foreach,第一个参数是 $metaname
,但第二个还不是 $metavalue
,你需要第二个 foreach 来循环它们:
foreach ($a as $metaname => &$group) { // & is present to unset the original array
foreach ($group as $i => $metavalue) { // here you get the distinct metavalues
foreach ($b as $row) {
if (!($row['metaname'] === $metaname)) {
continue;
}
if ($row['metavalue'] === $metavalue) {
unset($group[$i]);
}
}
}
}
var_dump($a);
之后 $a
的 var_dump()
array(2) {
["ip"]=>
array(1) {
[1]=>
string(7) "4.3.2.1"
}
["domain"]=>
&array(1) {
[1]=>
string(14) "another.domain"
}
}
第一个 foreach() 将访问 $a
数组的不同值,而 $metavalue
实际上是包含这些元值的数组。
关于php - 比较两个数组的两个值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30810100/