Combine 3 arrays with column format(PHP)

Question

I have 3 arrays like this format

$array1 = array(a,b,c,d);
$array2  = array(e,f,g,h);
$array3  = array(i,j,k,l);

I need to merge this 3 arrays with column format

My expected result

array(a,e,i,b,f,j,c,g,k,d,h,l);

How can i do this. I am already do array merge. But its merge row format. but i need column format.

Please Advise

Updated

$array1 = array(a,b,c,d,x,u,xx);
$array2  = array(e,f,g,h,s,d,t);
$array3  = array(i,j,k,l);

Answer 1

PHP 5.5 solution:

$array1 = array('a', 'b', 'c', 'd');
$array2  = array('e', 'f', 'g', 'h');
$array3  = array('i', 'j', 'k', 'l');

$composite = array($array1, $array2, $array3);
$count = count($array1);
$result = array();
for ($i = 0; $i < $count; $i++) {
    $result = array_merge($result, array_column($composite, $i));
}
var_dump($result);

EDIT

or another alternative that will work with versions of PHP before 5.5

$array1 = array('a','b','c','d');
$array2  = array('e','f','g','h');
$array3  = array('i','j','k','l');

$composite = array($array1, $array2, $array3);
// transpose
array_unshift($composite, null);
$tmpResult = call_user_func_array('array_map', $composite);
// flatten
$result = call_user_func_array('array_merge', $tmpResult);
var_dump($result);

EDIT #2

Using this second method, if the initial arrays are varying lengths you will get "padded" NULL entries in the final result; these can be removed if they're not wanted by using array_filter();

$array1 = array('a','b','c','d','x','u','xx');
$array2 = array('e','f','g','h','s','d','t');
$array3 = array('i','j','k','l');

$composite = array($array1, $array2, $array3);
// transpose
array_unshift($composite, null);
$tmpResult = call_user_func_array('array_map', $composite);
// filter and flatten
$result = array_filter(
    call_user_func_array('array_merge', $tmpResult),
    function ($value) {
        return $value !== NULL;
    }
);
var_dump($result);

Answer 2

If the 3 arrays have the same length, then:

$result = array();
$count = count($array1);
for ($i = 0; $i < $count; $i++)
{
    $result[] = $array1[$i];
    $result[] = $array2[$i];
    $result[] = $array3[$i];
}
var_export($result);

-

                    ---------------------------------- 

If the arrays do not have the same length:

$result = array();
$count = max(count($array1), count($array2), count($array3));
for ($i = 0; $i < $count; $i++)
{
    isset($array1[$i]) && $result[] = $array1[$i];
    isset($array2[$i]) && $result[] = $array2[$i];
    isset($array3[$i]) && $result[] = $array3[$i];
}
var_export($result);

Answer 3

found the answer in here.

use this function as bellow, no matter how many elements in each array this will work.

array_interlace($array1, $array2, $array3)

function array_interlace() {
    $args = func_get_args();
    $total = count($args);

    if($total < 2) {
        return FALSE;
    }

    $i = 0;
    $j = 0;
    $arr = array();

    foreach($args as $arg) {
        foreach($arg as $v) {
            $arr[$j] = $v;
            $j += $total;
        }

        $i++;
        $j = $i;
    }

    ksort($arr);
    return array_values($arr);
} 

results for updated question :

Array ( [0] => a [1] => e [2] => i [3] => b [4] => f [5] => j [6] => c [7] => g [8] => k [9] => d [10] => h [11] => l [12] => x [13] => s [14] => u [15] => d [16] => xx [17] => t ) 

Answer 4

Try this

$sorted array = sort(array_merge( (array) $array1, (array) $array2 , (array) $array3)