the following two arrays are used to find the best merging method
$arr_1 = [
["id"=>1,"cc"=>"dd","ee"=>"hh"],
["id"=>2,"cc"=>"gg","ee"=>"qq"],
["id"=>3,"cc"=>"yy","ee"=>""],
];
$arr_2 = [
["id"=>2,"hh"=>"-sharp-sharp","ll"=>"^^"],
["id"=>1,"hh"=>"@@","ll"=>"%%"],
["id"=>4,"hh"=>"$$","ll"=>"&&"],
];
$arr = [];
foreach ($arr_1 as $key => &$value) {
foreach ($arr_2 as $k => $item) {
if ($value["id"] === $item["id"]) {
$temp = array_merge($value,$item);
$arr[] = $temp;
}
}
}
$temp_ids = array_column($arr, "id");
$sub_1 = array_filter($arr_1,function($o) use ($temp_ids){
if (!in_array($o["id"], $temp_ids)) {
return true;
}
});
$sub_2 = array_filter($arr_2,function($i) use ($temp_ids){
if (!in_array($i["id"], $temp_ids)) {
return true;
}
});
$res = array_merge($arr,$sub_1,$sub_2);
echo json_encode($res);
exit;result
[{"id":1,"cc":"dd","ee":"hh","hh":"@@","ll":"%%"},{"id":2,"cc":"gg","ee":"qq","hh":"-sharp-sharp","ll":"^^"},{"id":3,"cc":"yy","ee":"\uff01\uff01"},{"id":4,"hh":"$$","ll":"&&"}]