[英]How can I get specific value in array
I will explain clearly我会解释清楚
$array = array("1" => array(0 =>"aa",1 =>"bb", 2 => "cc",3=>"dd"),
"2" => array(0 =>"aa1",1 =>"bb1", 2 => "cc1",3=>"dd1"));
In this two dimension are在这两个维度中
$array2[$a][$b];
I know $a value and $b is unknown我知道 $a 值而 $b 未知
If I using $a =1
, I want to filter array(0 =>"aa",1 =>"bb", 2 => "cc",3=>"dd")
this array如果我使用
$a =1
,我想过滤array(0 =>"aa",1 =>"bb", 2 => "cc",3=>"dd")
这个数组
But I need to get the second array element.但我需要获取第二个数组元素。 Any function is available to do that?
任何功能都可以做到这一点?
This is how you do it:这是你如何做到的:
$a = array(1=>'a', 2=>'b', 3=>'c');
//display the value with key 2:
echo $a[2];
//remove the value with key 2 (throw-out / bring-out in your language)
unset($a[2]);
//now display whole array to show that value with key 2 is gone
print_r($a);
This outputs:这输出:
b
乙
And then it outputs:然后它输出:
Array ( [1] => a [3] => c )
数组 ( [1] => a [3] => c )
make new array you want to sperate specific elements that key制作新的数组,以分散关键的特定元素
$newarr = array(2,5,8);
foreach($arr1 as v1){
foreach($arr2 as $k => $v2 ){
if (in_array($k,$newarr))
{
// process ...
}
}
}
The below link might help you: 以下链接可能会帮助您:
https://www.php.net/manual/en/function.array-column.php https://www.php.net/manual/zh/function.array-column.php
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