Array remapping - Can I do this better? - php

Question

for starters I have the following array objects (id, foo and bar are a result of a database query and should be addressed as object variables ->id)
array([0] => array([id] => 1, [foo] => 'a'), [1] => array([id] => 2, [foo] => 'b')
and
array([0] => array([id] => 1, [bar] => 'b'), [1] => array([id] => 2, [bar] => 'a')
I want to create one new array with the id column as key
array([1] => array([foo] => 'a', [bar] => 'b'), [2] => array([foo] => 'b', [bar] => 'a')
I used the following lines of code to create the desired array:
foreach($array1 as $row1) {
$newArray1[$row1->id] = $row1;
}
foreach($array2 as $row2) {
$newArray2[$row2->id] = $row2;
}
foreach($array2 as $key => row3) { //array 2 is always longer or equal to array 1
$result[$key]['bar'] = $newArray2[$key]->bar;
if (isset($newArray1[$key])) {
$result[$key]['foo'] = $newArray1[$key]->foo;
} else {
$result[$key]['bar'] = 0;
}
}
I think this could be done a lot easier. Is this the case, if so, how?

Answer 1

If I understood you need to merge two arrays using as index the 'id' field, which is equal to both ones.
I would do this:
$newarray = array();
for($i=0;$i<count($array1);$i++)
$newarray[$array1[$i]["id"]] = array($array1[$i]["foo"], $array2[$i]["bar"]);

Answer 2

instead of creating new array you can do this:
$arr1=array('0' => array('id' => 1, 'foo' => 'a'), '1' => array('id' => 2, 'foo' => 'b'));
$arr2=array('0' => array('id' => 1, 'bar' => 'b'), '1' => array('id' => 2, 'bar' => 'a'));
for($i=0;$i<count($arr1);$i++){
$arr1[$i] = array("foo"=>$arr1[$i]["foo"], "bar"=>$arr2[$i]["bar"]);
}
print_r($arr1);