Question

how do I compare the current array value with previous array value.. Example if I have the following array and want to compare [BM1367 PD C 70][ST00576][‘transferfrom’] with previous array which is [BM1367 PD B 85][ST00576][‘transferfrom’] ?

    [BM1367    PD  B  85] => Array
        (
            [ST00576] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 102
                    [refno] =>  

                )

            [OT01606] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 66
                    [refno] => 102 - ST00576

                )

        )

    [BM1367    PD  C  70] => Array
        (
            [ST00576] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 102
                    [refno] =>  

                )

            [OT01606] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 66
                    [refno] => 102 - ST00576

                )

        )

    [BM1367    PD  C  85] => Array
        (
            [ST00576] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 102
                    [refno] =>  

                )

            [OT01606] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 66
                    [refno] => 102 - ST00576

                )

        )

    [BM1367    PD  D  85] => Array
        (
            [ST00576] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 102
                    [refno] =>  

                )

            [OT01606] => stdClass Object
                (
                    [transferfrom] => 102
                    [transferto] => 66
                    [BR_ID] => 66
                    [refno] => 102 - ST00576

                )

        )

)

Answer 1

You asked:

how do I compare the current array value with previous array value

I think you may want to look at the following PHP functions

1. current() – http://www.php.net/manual/en/function.current.php
2. prev() – http://www.php.net/manual/en/function.prev.php
3. next() – http://php.net/manual/en/function.next.php

For example:

<?php
$transport = array('foot', 'bike', 'car', 'plane');
$mode = current($transport); // $mode = 'foot';
$mode = next($transport);    // $mode = 'bike';
$mode = next($transport);    // $mode = 'car';
$mode = prev($transport);    // $mode = 'bike';
$mode = end($transport);     // $mode = 'plane';
?>

I was able to use those on a computation formula, work’s great! It is also useful when comparing current from previous or next array on yours.