Question

I got the following array (shortened … multiple dot mean that they are data there, both array start at entry 1 until the end.

Array
(
    [12U_S_136_15_29_141] => Array
        (
            .....

            [35] => Array
                (
                    [stop_sequence] => 35
                    [stop_id] => 1601394
                )

            .....

            [46] => Array
                (
                    [stop_sequence] => 46
                    [stop_id] => 122052
                )

            [47] => Array
                (
                    [stop_sequence] => 47
                    [stop_id] => 136208
                )

            [48] => Array
                (
                    [stop_sequence] => 48
                    [stop_id] => 128163
                )

        )

    [12U_S_141_57_6_141] => Array
        (
            [1] => Array
                (
                    [stop_sequence] => 1
                    [stop_id] => 1601394
                )

            .....

            [12] => Array
                (
                    [stop_sequence] => 12
                    [stop_id] => 122052
                )

            [13] => Array
                (
                    [stop_sequence] => 13
                    [stop_id] => 136208
                )

            [14] => Array
                (
                    [stop_sequence] => 14
                    [stop_id] => 128163
                )

        )

)

As you can see, both array end are equal… 35 = 1, 46 = 12, …, 48 = 14. By equal, I mean the same stop_id but will always be diffrent for stop_sequence and of course the array entry number.

I want to know how I can compare the entire array against the other so I can know if, here let’s say, the second array match the first one at 100% (except we don’t look for stop_sequence so this can be different. So in this case, both will be mark as “equal”, but if let’s say the last entry had a different stop_id (entry 48 would be != from the entry 14), the array will be mark as “not equal”.

Anyone have a path to lead me ? I keep thinking but do not know how. I’ve tryed array_compare but this leaded to nothing :\

Thanks

EDIT
Nothing can be change to the database. Also, the array need to be created this way (with weird text, ie 12U_S_136_15_29_141). I can do whatever in PHP.

Answer 1

fetch the stop_id in to new array:s and compare thous

here is a useful function

    function sub_array($array, $sub_key)
    {
            $new_array = array();
            if(is_array($array) AND $array)
            {
                    foreach($array as $key => $data)
                    {
                            $new_array[$key] = $data[$sub_key];
                    }
            }
            return $new_array;
    }

then just compare the arrays

if(sub_array($a['12U_S_136_15_29_141'], 'stop_id') == sub_array($a['12U_S_141_57_6_141'], 'stop_id'))

or if you know what stop_id that matches:

$first_stop_id_list = sub_array($a['12U_S_136_15_29_141'], 'stop_id');
$secound_stop_id_list = sub_array($a['12U_S_141_57_6_141'], 'stop_id');
$matches = array_intersect($first_stop_id_list, $secound_stop_id_list);

if(!$matches)
   echo "No stop_id matches";
else if($first_stop_id_list = $secound_stop_id_list)
   echo "all element was in both";
else if($matches == $first_stop_id_list)
   echo "all element in first was in secound";
else if($matches == $secound_stop_id_list)
   echo "all element in secound was in first";