从父行到子行的数组模式

Question

我的数组是：

[
"0"=>["id"=>111,"name"=>"abc","value"=>"s1"],
"1"=>["id"=>"","name"=>"","value"=>"s2"],
"2"=>["id"=>"","name"=>"","value"=>"s3"],
"3"=>["id"=>"222","name"=>"xyz","value"=>"a1"],
"4"=>["id"=>"","name"=>"","value"=>"a2"],
"5"=>["id"=>"","name"=>"","value"=>"a3"],
"6"=>["id"=>"","name"=>"","value"=>"a4"]
];

我需要以下格式的数组：

[
"0"=>["id"=>111,"name"=>"abc","value"=>["s1","s2","s3"],
"1"=>["id"=>"222","name"=>"xyz","value"=>"a1","a2","a3","a4"],
];

Answer 1

工作演示

<?php
$arr = [
"0"=>["id"=>111,"name"=>"abc","value"=>"s1"],
"1"=>["id"=>"","name"=>"","value"=>"s2"],
"2"=>["id"=>"","name"=>"","value"=>"s3"],
"3"=>["id"=>"222","name"=>"xyz","value"=>"a1"],
"4"=>["id"=>"","name"=>"","value"=>"a2"],
"5"=>["id"=>"","name"=>"","value"=>"a3"],
"6"=>["id"=>"","name"=>"","value"=>"a4"]
];
// An array to store the results
$results = [];
// Store the index of the current results element
// Start with -1 because going to begin with an increment
$index = -1;
foreach ($arr as $element) {
if ($element["id"] !== "") { // If contains an ID field
// begin with increment; initial value must be -1
$index++;
// Create new results element
$results[$index] = [ 
"id" => $element["id"],
"name" => $element["name"],
"value" => [
$element["value"],
],
];
}
else { // If does not contain an ID field
// Add another "value" to existing element at $index
$results[$index]["value"][] = $element["value"];
}
}
var_dump(json_encode($results));

输出：

[
{"id":111,"name":"abc","value":["s1","s2","s3"]},
{"id":"222","name":"xyz","value":["a1","a2","a3","a4"]}
]