Pushing a value onto the end of an array - php

Question

I have the following array, it's full of gibberish (I got bored using lorem ipsum so I started typing random stuff -- I'm testing ¬_¬).
I used mysqli_fetch_array to fetch this array.
[array1]
Array
(
[0] => Array
(
[title] => this is a new thread, and it is great and it should work
[thread_id] => 27
[content] => <p>hello, how are you? and what are you doing y'all and this should work</p>
[username] => umar
[author_id] => 12
[tags] => Array
(
[0] => lorem
)
)
[1] => Array
(
[title] => this is my second thread and it should work fine, just fine
[thread_id] => 28
[content] => <p>this is is good, that I think it should have a thread of its own, don't you think?</p>
[username] => umarrazzaq
[author_id] => 12
[tags] => Array
(
[0] => thread
[1] => less
)
)
)
I have another array [array2]:
Array ( [0] => Array ( [replies] => 2 [id] => 27 )
[1] => Array ( [replies] => 1 [id] => 28 ) )
I want to push this second array onto the first array, where the IDs match.
e.g.
So the first array will become:
[0] => Array
(
[title] => this is a new thread, and it is great and it should work
[thread_id] => 27
[content] => <p>hello, how are you? and what are you doing y'all and this should work</p>
[username] => umar
[author_id] => 12
[tags] => Array
(
[0] => lorem
)
**[replies] => 2**
)
I've tried passing by reference and using array_push in a foreach loop, but it only does it for one.

Answer 1

try this:
foreach($array1 as $key=>&$arr){
$arr['replies'] = $array2[$key]['replies']
}

Answer 2

It seems that you could do this also with a JOIN on your table
foreach($array1 as $key => $value)
{
$array1[$value['thread_id']] = $value;
}
foreach($array2 as $value)
{
array_push($array1[$value['id']], $value);
}

Answer 3

if i am getting your question correct then you want to merge array where array2.id and array1.thread_id is same. In that case you can't use array_merge. Unless you change your second array as something like below.
array(
[$thead_id] => Array ( [replies] => 2)
....
)
then you can use array_merge easily .