Build array of keys and values? - php

Question

Im trying to build a json array in php with this structure:
[{"id":"name last name",
"id":"name last name",
"id":"name last name"
}]
where the id key is always a different number, not only id string
Im trying to do this:
for ($i = 0; $i < count($array); $i++){
//$namesArray[] = array($array[$i]["id"] =>$array[$i]["name"].
// " ".$array[$i]["last"]." ".$array[$i]["name"]);
$namesArray[] = array_fill_keys(
$array[$i]["id"],
$array[$i]["name"]." ".
$array[$i]["last"]." ".
$array[$i]["name"]
);
}
echo json_encode($namesArray);
With the commented lines I get something like this:
[{"id":"name last name"},
{"id":"name last name"}
]
But I dont want that, I want all keys and values in a single array.
Thanks.

Answer 1

Keep your code clean
$array = [];
$array[] = ['id'=>3 , 'name'=>'H', 'last'=>'bensiali' ];
$array[] = ['id'=>4 , 'name'=>'Simon', 'last'=>'Says' ];
$array[] = ['id'=>5 , 'name'=>'Mohammed', 'last'=>'Ali' ];
$val = [];
foreach ($array as $key => $value) {
$val[$value['id']] = sprintf("%s %s" , $value['name'] , $value['last']);
}
echo json_encode($val);
And output will be:
{"3":"H bensiali","4":"Simon Says","5":"Mohammed Ali"}

Answer 2

Here is how you can do it:
// sample data
$array = array(
array("id" => 1, "name" => "James", "last" => "Last"),
array("id" => 2, "name" => "Micheal", "last" => "Jackson"),
);
// create empty object (associative array)
$obj = (object) array();
// add key/value pairs to that object
foreach ($array as $row) {
$obj->$row["id"] = $row["name"] . " " . $row["last"];
}
// wrap object in a single-element array
$result = array($obj);
// output to JSON string
echo json_encode($result, JSON_PRETTY_PRINT);
Output:
[
{
"1": "James Last",
"2": "Micheal Jackson"
}
]

Answer 3

You can use functional approach to fill desired array with array_reduce:
$array = [
['id' => 1, 'name' => 'name1', 'last' => 'last1'],
['id' => 2, 'name' => 'name2', 'last' => 'last2'],
['id' => 3, 'name' => 'name3', 'last' => 'last3'],
];
$newArray = array_reduce($array, function($carry, $item) {
$carry[$item['id']] = $item["name"]." ".
$item["last"]." ".
$item["name"];
return $carry;
});
var_dump($newArray);
And output will be:
array(3) {
[1]=>
string(17) "name1 last1 name1"
[2]=>
string(17) "name2 last2 name2"
[3]=>
string(17) "name3 last3 name3"
}