rearrange the php array selectively.

I have the following PHP array and want to rearrange their array based on the selection of the value.
I want to name for these 3 become the first element of the array and keep the rest of the elements as it is.
Whitesoot , Seqoci, Kei Mag


Array
(
    [1] => Array
        (
            [merchant_id] => 1
            [name] => Poplook
        )

    [3] => Array
        (
            [merchant_id] => 3
            [name] => Phatculture
        )

    [4] => Array
        (
            [merchant_id] => 4
            [name] => PrettyChase
        )

    [6] => Array
        (
            [merchant_id] => 6
            [name] => Seqoci
                    )

    [8] => Array
        (
            [merchant_id] => 8
            [name] => Whitesoot
        )

    [10] => Array
        (
            [merchant_id] => 10
            [name] => Su Estilo
        )

    [12] => Array
        (
            [merchant_id] => 12
            [name] => Kei Mag
        )

    [13] => Array
        (
            [merchant_id] => 13
            [name] => Emcee Couture
        )

    [17] => Array
        (
            [merchant_id] => 17
            [name] => Nile
        )

    [14] => Array
        (
            [merchant_id] => 14
            [name] => Zalora
        )

    [22] => Array
        (
            [merchant_id] => 22
            [name] => Tuesday Couture
        )

    [18] => Array
        (
            [merchant_id] => 18
            [name] => Say Fashion
        )

    [23] => Array
        (
            [merchant_id] => 23
            [name] => Tudung2u


)

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Example result i want is as below whereby u can see the first 3 elements are Whitesoot , Seqoci and Kei Mag.
I am thinking to use in_array, example $first3element = array("Whitesoot", "Seqoci", "Kei Mag") and then use in_array for comparisoon. But I don't know how to sort them out.:
Array
(
    [1] => Array
        (
            [merchant_id] => 1
            [name] => Whitesoot
        )

    [3] => Array
        (
            [merchant_id] => 3
            [name] => Seqoci
        )

    [4] => Array
        (
            [merchant_id] => 4
            [name] => Kei Mag
        )

    [6] => Array
        (
            [merchant_id] => 6
            [name] => Phatculture
                    )

    [8] => Array
        (
            [merchant_id] => 8
            [name] => Poplook
        )

    [10] => Array
        (
            [merchant_id] => 10
            [name] => Su Estilo
        )

    [12] => Array
        (
            [merchant_id] => 12
            [name] => PrettyChase
        )

    [13] => Array
        (
            [merchant_id] => 13
            [name] => Emcee Couture
        )

    [17] => Array
        (
            [merchant_id] => 17
            [name] => Nile
        )

    [14] => Array
        (
            [merchant_id] => 14
            [name] => Zalora
        )

    [22] => Array
        (
            [merchant_id] => 22
            [name] => Tuesday Couture
        )

    [18] => Array
        (
            [merchant_id] => 18
            [name] => Say Fashion
        )

    [23] => Array
        (
            [merchant_id] => 23
            [name] => Tudung2u


)

Open in new window

heng tangPHP DeveloperAsked:
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Dave BaldwinFixer of ProblemsCommented:
Your original array is a two-dimensional array and your $first3element = array("Whitesoot", "Seqoci", "Kei Mag") is a one dimensional array which will have the 'keys' "0,1,2".  You can't really "get there from here".

What is it you're trying to do (other than rearrange things)?
0
heng tangPHP DeveloperAuthor Commented:
Hi Dave,

I am thinking to compare the element of 'name' from each array element with the $first3element .If found in $first3element  array, array_unshift them to the begining of the arrary to produce the desire result.
0
heng tangPHP DeveloperAuthor Commented:
I don't mind if we need to change the $first3element to $first3element = array(0=>'Whitesoot', 1 => 'Secoqi', 2 => 'Kei Mag') as  a 2 dimensional array as long as it can produce the desire result;
0
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Dave BaldwinFixer of ProblemsCommented:
$first3element = array(0=>'Whitesoot', 1 => 'Secoqi', 2 => 'Kei Mag') is still one dimensional and exactly the same as $first3element = array("Whitesoot", "Seqoci", "Kei Mag").  The default 'keys' are numbers starting with 0.

Forget about rearranging them for a moment.  What is the purpose or 'business' result you're trying to accomplish?
0
heng tangPHP DeveloperAuthor Commented:
I want to be able to display the predefined 3 elements as the top 3 of the array out of the original array.And the predefined top 3 element is selectable based on the name element of the arrays
0
Dave BaldwinFixer of ProblemsCommented:
That doesn't make any sense.  If you know what they are because you have "predefined" them, just display them.
0
heng tangPHP DeveloperAuthor Commented:
you will know what I intend to do if you look carefully at the code above, comparing the original array vs the desire array.
0
heng tangPHP DeveloperAuthor Commented:
its OK David, i got the idea already..
I will create 2 empty array. If the element value is in_array of the $first3element , then will push to the 1st array, else will push to the 2nd array. In the end I will array_merge these two arrays.

Settled..
0

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Ray PaseurCommented:
Nobody does this - it's not a design pattern in programing.  The data would probably be in a database anyway.  That's why Dave Baldwin was trying to get to the underlying thinking with this question: "What is the purpose or 'business' result you're trying to accomplish?"

The expected design pattern would be a generalized lookup function, something like this code snippet.  But that said, you might want to look for an introductory programming class at a nearby college.  If you want to try to learn PHP programming yourself (and it will take a lot longer this way) you might find some useful guidance in this article.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/A_11769-And-by-the-way-I-am-new-to-PHP.html

<?php // demo/temp_heng_tang.php
error_reporting(E_ALL);

function lookup ($name=NULL)
{
    static
    $array
    = array
    ( array( 'merchant_id' => '1', 'name' => 'Poplook'      )
    , array( 'merchant_id' => '3', 'name' => 'Phatculture'  )
    , array( 'merchant_id' => '4', 'name' => 'PrettyChase'  )
    , array( 'merchant_id' => '6', 'name' => 'Seqoci'       )
    )
    ;
    foreach ($array as $sub_array)
    {
        if ($name == $sub_array['name']) return $sub_array['merchant_id'];
    }
    return FALSE;
}

var_dump( lookup('Seqoci') );
var_dump( lookup('Foobar') );

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Good luck with your project, ~Ray
0
heng tangPHP DeveloperAuthor Commented:
found solution myself
0
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