php split array into smaller even arrays

I have a function that is supposed to split my array into smaller, evenly distributed arrays, however it seems to be duplicating my data along the way. If anyone can help me out that'd be great.

Here's the original array:

Array
(
    [0] => stdClass Object
        (
            [bid] => 42
            [name] => Ray White Mordialloc
            [imageurl] => sp_raywhite.gif
            [clickurl] => http://www.raywhite.com/
        )

    [1] => stdClass Object
        (
            [bid] => 48
            [name] => Beachside Osteo
            [imageurl] => sp_beachside.gif
            [clickurl] => http://www.beachsideosteo.com.au/
        )

    [2] => stdClass Object
        (
            [bid] => 53
            [name] => Carmotive
            [imageurl] => sp_carmotive.jpg
            [clickurl] => http://www.carmotive.com.au/
        )

    [3] => stdClass Object
        (
            [bid] => 51
            [name] => Richmond and Bennison
            [imageurl] => sp_richmond.jpg
            [clickurl] => http://www.richbenn.com.au/
        )

    [4] => stdClass Object
        (
            [bid] => 50
            [name] => Letec
            [imageurl] => sp_letec.jpg
            [clickurl] => www.letec.biz
        )

    [5] => stdClass Object
        (
            [bid] => 39
            [name] => Main Street Mordialloc
            [imageurl] => main street cafe.jpg
            [clickurl] => 
        )

    [6] => stdClass Object
        (
            [bid] => 40
            [name] => Ripponlea Mitsubishi
            [imageurl] => sp_mitsubishi.gif
            [clickurl] => 
        )

    [7] => stdClass Object
        (
            [bid] => 34
            [name] => Adrianos Pizza & Pasta
            [imageurl] => sp_adrian.gif
            [clickurl] => 
        )

    [8] => stdClass Object
        (
            [bid] => 59
            [name] => Pure Sport
            [imageurl] => sp_psport.jpg
            [clickurl] => http://www.puresport.com.au/
        )

    [9] => stdClass Object
        (
            [bid] => 33
            [name] => Two Brothers
            [imageurl] => sp_2brothers.gif
            [clickurl] => http://www.2brothers.com.au/
        )

    [10] => stdClass Object
        (
            [bid] => 52
            [name] => Mordialloc Travel and Cruise
            [imageurl] => sp_morditravel.jpg
            [clickurl] => http://www.yellowpages.com.au/vic/mordialloc/mordialloc-travel-cruise-13492525-listing.html
        )

    [11] => stdClass Object
        (
            [bid] => 57
            [name] => Southern Suburbs Physiotherapy Centre
            [imageurl] => sp_sspc.jpg
            [clickurl] => http://www.sspc.com.au
        )

    [12] => stdClass Object
        (
            [bid] => 54
            [name] => PPM Builders
            [imageurl] => sp_ppm.jpg
            [clickurl] => http://www.hotfrog.com.au/Companies/P-P-M-Builders
        )

    [13] => stdClass Object
        (
            [bid] => 36
            [name] => Big River
            [imageurl] => sp_bigriver.gif
            [clickurl] => 
        )

    [14] => stdClass Object
        (
            [bid] => 35
            [name] => Bendigo Bank Parkdale / Mentone East
            [imageurl] => sp_bendigo.gif
            [clickurl] => http://www.bendigobank.com.au
        )

    [15] => stdClass Object
        (
            [bid] => 56
            [name] => Logical Services
            [imageurl] => sp_logical.jpg
            [clickurl] => 
        )

    [16] => stdClass Object
        (
            [bid] => 58
            [name] => Dicount Lollie Shop
            [imageurl] => new dls logo.jpg
            [clickurl] => 
        )

    [17] => stdClass Object
        (
            [bid] => 46
            [name] => Patterson Securities
            [imageurl] => cmyk patersons_withtag.jpg
            [clickurl] => 
        )

    [18] => stdClass Object
        (
            [bid] => 44
            [name] => Mordialloc Personal Trainers
            [imageurl] => sp_mordipt.gif
            [clickurl] => #
        )

    [19] => stdClass Object
        (
            [bid] => 37
            [name] => Mordialloc Cellar Door
            [imageurl] => sp_cellardoor.gif
            [clickurl] => 
        )

    [20] => stdClass Object
        (
            [bid] => 41
            [name] => Print House Graphics
            [imageurl] => sp_printhouse.gif
            [clickurl] => 
        )

    [21] => stdClass Object
        (
            [bid] => 55
            [name] => 360South
            [imageurl] => sp_360.jpg
            [clickurl] => 
        )

    [22] => stdClass Object
        (
            [bid] => 43
            [name] => Systema
            [imageurl] => sp_systema.gif
            [clickurl] => 
        )

    [23] => stdClass Object
        (
            [bid] => 38
            [name] => Lowe Financial Group
            [imageurl] => sp_lowe.gif
            [clickurl] => http://lowefinancial.com/
        )

    [24] => stdClass Object
        (
            [bid] => 49
            [name] => Kim Reed Conveyancing
            [imageurl] => sp_kimreed.jpg
            [clickurl] => 
        )

    [25] => stdClass Object
        (
            [bid] => 45
            [name] => Mordialloc Sporting Club
            [imageurl] => msc logo.jpg
            [clickurl] => 
        )

)

Here's the php function which is meant to split the array:

function split_array($array, $slices) { 

        $perGroup = floor(count($array) / $slices);
        $Remainder = count($array) % $slices ;
        $slicesArray = array();

        $i = 0;
        while( $i < $slices ) {
            $slicesArray[$i] = array_slice($array, $i * $perGroup, $perGroup);
            $i++;
        }

        if ( $i == $slices ) { 
            if ($Remainder > 0 && $Remainder < $slices) {

                $z = $i * $perGroup +1;
                $x = 0;
                while ($x < $Remainder) {

                    $slicesRemainderArray = array_slice($array, $z, $Remainder+$x);
                    $remainderItems = array_merge($slicesArray[$x],$slicesRemainderArray);
                    $slicesArray[$x] = $remainderItems;

                $x++;
                $z++;
                }
            }
        };

        return $slicesArray;
    }

Here's the result of the split (it somehow duplicates items from the original array into the smaller arrays):

^^ As you can see there are duplicates from the original array in the newly created smaller arrays.

I thought I could remove the duplicates using a multi-dimensional remove duplicate function but that didn't work. I'm guessing my problem is in the array_split function.

Any suggestions? :)

标签： php arrays split evenly

8条回答

我只想做你的唯一

2楼-- · 2020-02-01 02:42

It is simple way to divide php array in two equal sections. and you can fetch all elements and values of both arrays using foreach easity

list($firstarray, $secondarray) = array_chunk($vorstand_two_column, ceil(count($all_array_contents) / 2));  

foreach($firstarray as $fa) {
.... Code ....
}

foreach($secondarray as $sa) {
.... Code ....
}

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Juvenile、少年°

3楼-- · 2020-02-01 02:48

function split_array(&$array, $slices) {
  $result = array();
  $l = count($array)-1;
  for ($i=0; $i<=$l; $i++) {
    if ($i == 0  || $i % $slices == 0) $tmp = array();
    $tmp[] = $array[$i];
    if ($i == $l || $i % $slices == 1) $result[] = $tmp; 
  }
  return $result;
}

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放我归山

4楼-- · 2020-02-01 02:53

EDIT: There's array_chunk, which does just that.

Well, I didn't feel like debugging, so I wrote a version with array_reduce:

$pergroup = 2;
$redfunc = function ($partial, $elem) use ($pergroup) {
    $groupCount = count($partial);
    if ($groupCount == 0 || count(end($partial)) == $pergroup)
        $partial[] = array($elem);
    else
        $partial[$groupCount-1][] = $elem;

    return $partial;
};

$arr = array(1,2,3,4,5);

print_r(array_reduce($arr, $redfunc, array()));

gives

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 2
        )

    [1] => Array
        (
            [0] => 3
            [1] => 4
        )

    [2] => Array
        (
            [0] => 5
        )

)

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SAY GOODBYE

5楼-- · 2020-02-01 02:54

Try this a simple usage. When it finds empty string it splits the array into two arrays. One from beggining to empty string index. Other from empty string index to the last.
Note : Emty string is not included in both. it is used only for condition checking.

    $column[] = "id";
    $column[] = "name";
    $column[] = "email";
    $column[] = "password";
    $column[] = "";
    $column[] = "uid";
    $column[] = "uname";
    $column[] = "mname";
    $column[] = "lname";
    $column[] = "city";
    $column[] = "country";
    $column[] = "zip";
    $column[] = "cell";
    $column[] = "address";
    split_array($column);

function split_array($column)
{

    $total = count($column);
    $num = array_search('',$column);

    $split = $total - $num ;
    $outer_sql = array_slice( $column , - ($split) + 1);
    array_splice($column , $num);

    echo "<pre>";
    print_r($outer_sql);
    echo "</pre>";
    echo "<pre>";
    print_r($column);
    echo "</pre>";  

}

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男人必须洒脱

6楼-- · 2020-02-01 02:55

$sections = array_chunk(array('k', 'l', 'm', 'n', 'o'), 2);

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在下西门庆

7楼-- · 2020-02-01 02:56

It seems to me that the distribution of the remaining items is too complicated.

If you know how many items are missing ($Remainder), why don´t you just generate a remaining slice and pop-off items with array_pop() until it´s empty?

By the way, you can use that procedure for the whole array as well.

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