Question

我有以下数组：

Array ( 
[0] => Array ( [id] => 1 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[1] => Array ( [id] => 1 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[2] => Array ( [id] => 1 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 

[3] => Array ( [id] => 2 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[4] => Array ( [id] => 2 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[5] => Array ( [id] => 2 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 

[6] => Array ( [id] => 3 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[7] => Array ( [id] => 3 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[8] => Array ( [id] => 3 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 
)

如何根据id键拆分它并为每个id创建一个数组？

最诚挚的问候 Artam

Answer 1

这将是你问题的答案......

<?php
$payload = Array ( 
[0] => Array ( [id] => 1 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[1] => Array ( [id] => 1 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[2] => Array ( [id] => 1 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 

[3] => Array ( [id] => 2 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[4] => Array ( [id] => 2 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[5] => Array ( [id] => 2 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 

[6] => Array ( [id] => 3 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[7] => Array ( [id] => 3 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[8] => Array ( [id] => 3 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 
)

// creates "separate" variables for entries named $payload_0, $payload_1, ...
foreach ($payload as $key=>$value) {
  $innerName = sprintf('payload_%s', $key);
  $$innerName = $value; 
}

// test output to make the conversion clear: 
var_dump($payload_4);

......这没什么意义。

这只会使事情变得更复杂，并使内存使用量翻倍。您也可以直接使用内部数组作为$payload[4]。

所以问题是：为什么你想做这样的事情？出于什么目的？

旁注：上面的代码不起作用，因为我刚刚复制了指定的数组符号，这是无效的PHP代码。但你应该明白......

考虑到下面的评论，我说这更有可能是你想要的：

<?php
$payload = Array ( 
[0] => Array ( [id] => 1 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[1] => Array ( [id] => 1 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[2] => Array ( [id] => 1 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 

[3] => Array ( [id] => 2 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[4] => Array ( [id] => 2 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[5] => Array ( [id] => 2 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 

[6] => Array ( [id] => 3 [grpname] => RF [grpid] => 1 [value] => 1.40 ) 
[7] => Array ( [id] => 3 [grpname] => BP [grpid] => 2 [value] => 1.90 ) 
[8] => Array ( [id] => 3 [grpname] => DSH [grpid] => 3 [value] => 2.46 ) 
)

// iterate over the payload array and do whatever you want to do with the entries: 
foreach ($payload as $key=>$value) {
    // here output the inner array however you want to
    // $value now _is_ the inner value in each iteration of the loop
}

在数组中解析数组

1 个答案: