Merging one array into another - php

Question

I have 2 arrays
Array 1:
array:3 [▼
0 => 1
1 => 2.3
2 => 4.5
]
Array 2:
array:3 [▼
0 => array:2 [▼
"name" => "john"
"age" => 34
]
1 => array:2 [▼
"name" => "doe"
"age" => 12
]
2 => array:2 [▼
"name" => "kelvin"
"age" => 14
]
]
How do I merge array 1 into array 2 so that I have something like this-
array:3 [▼
0 => array:3 [▼
"name" => "john"
"age" => 34,
"score" => 1
]
1 => array:3 [▼
"name" => "doe"
"age" => 12,
"score" => 2.3
]
2 => array:3 [▼
"name" => "kelvin"
"age" => 14,
"score" => 4.5
]
]
Notice that the values of array 1 now have keys called 'score'.

Answer 1

You can use foreach loop with reference &:
$ar = [1,2,3.4];
$ar2 = [['name'=>'Joe','age' => 33],['name'=>'Joe2','age' => 33],['name'=>'Joe3','age' => 33]];
foreach($ar2 as $ind=>&$person){
$person['score'] = $ar[$ind];
}
print_r($ar2);
Demo
Output:
Array
(
[0] => Array
(
[name] => Joe
[age] => 33
[score] => 1
)
[1] => Array
(
[name] => Joe2
[age] => 33
[score] => 2
)
[2] => Array
(
[name] => Joe3
[age] => 33
[score] => 3.4
)
)

Answer 2

You can also use array_walk to walk through the array.
<?php
$a = [1,2.3,4.5];
$b = [
["name" => "john", "age" => 34],
["name" => "doe","age" => 12],
["name" => "kelvin", "age" => 14]
];
array_walk($a,function($val,$key) use (&$b){
$b[$key]['score'] = $val;
});
print_r($b);
Demo: https://3v4l.org/58rXG