Question

I know it’s simple task, but my mind not clicking at present for appropriate solution.

I have 2 arrays

$array1=Array
(
    [302] => Array
        (
            [id] => 302
            [medical_id] => 55
            [medication_name] => disprin
            [medication_frequency] => 1
            [medication_status] => Stoped
            [users_id] => 106
            [update_date] => 2012-03-02 11:03:57
        )

)

$array2=Array
(
    [302] => Array
        (
            [medication_id] => 302
            [id] => 14
            [medical_id] => 55
            [medication_name] => disprin
            [medication_frequency] => 2
            [medication_status] => Stoped
            [users_id] => 106
            [update_date] => 2012-03-02 11:03:57
            [change_date] => 
        )

    [305] => Array
        (
            [medication_id] => 305
            [id] => 15
            [medical_id] => 57
            [medication_name] => disprin
            [medication_frequency] => 2
            [medication_status] => Continued
            [users_id] => 106
            [update_date] => 2012-03-02 11:02:46
            [change_date] => 
        )

)

I want Output:

$outputarray=Array
(
      [302] => Array
        (
            [id] => 302
            [medical_id] => 55
            [medication_name] => disprin
            [medication_frequency] => 1
            [medication_status] => Stoped
            [users_id] => 106
            [update_date] => 2012-03-02 11:03:57
        )

    [305] => Array
        (
            [medication_id] => 305
            [id] => 15
            [medical_id] => 57
            [medication_name] => disprin
            [medication_frequency] => 2
            [medication_status] => Continued
            [users_id] => 106
            [update_date] => 2012-03-02 11:02:46
            [change_date] => 
        )

)

means if same key is exist in array1 then take it from array1 else from array2.

I tried with some PHP functions like array_merge,array_merge_recursive but not got desired output.

am not able to recollect memory now, Please suggest me any PHP array function to sort out this.

Answer 1

It’s so simple that it’s almost unethical:

$outputArray = $array1 + $array2;

Array union (above) does what you describe. Using array_merge could also work in general, but not directly with such input because your keys are integers.