convert 2d array to a string using php

Question

I have the following array

 01 03 02 15
 05 04 06 10
 07 09 08 11
 12 14 13 16

I want to convert a string like the following:

Answer 1

I'm assuming that you have this array:

$array = array (
  array ('01','03','02','15'),
  array ('05','04','06','10'),
  array ('07','09','08','11'),
  array ('12','14','13','16')
);

In which case, you can do this:

$tmpArr = array();
foreach ($array as $sub) {
  $tmpArr[] = implode(',', $sub);
}
$result = implode('|', $tmpArr);
echo $result;

See it working

Answer 2

$input = array (
    array ('01','03','02','15'),
    array ('05','04','06','10'),
    array ('07','09','08','11'),
    array ('12','14','13','16'),
);

echo implode('|', array_map('implode', $input, array_fill(0, count($input), ',')));

Answer 3

Looking at the solutions proposed so far, only one actually generates the correct output requested by the OP.

So, stealing unashamedly from salathe's neat conversion, but with a transpose to provide the correct result:

$input = array ( 
    array ('01','03','02','15'), 
    array ('05','04','06','10'), 
    array ('07','09','08','11'), 
    array ('12','14','13','16'), 
); 

function transpose($array) {
    array_unshift($array, null);
    return call_user_func_array('array_map', $array);
}

$transposed = transpose($input);

echo implode('|', array_map('implode', $transposed, array_fill(0, count($transposed), ','))); 

Answer 4

Given your array as $myArray, like this:

$newArray = array();
foreach ($myArray as $row) {
    $rowValue = implode(',', $row);
    $newArray[] = $rowValue;
}
$finalString = implode('|', $newArray);

Answer 5

$input = array(
    array('01', '02', '03', '04'),
    array('11', '12', '13', '14'),
    array('21', '22', '23', '24'),
    array('31', '32', '33', '34'),
);
$newArray = array();
foreach($input as $rowIndex => $row) {
    foreach($row as $key => $val) {
        if(!$newArray[$key]) {
            $newArray[$key] = array();
        }
        $newArray[$key][$rowIndex] = $val;
    }
}
$strRows = array();
foreach($newArray as $key => $row) {
    $strRows[$key] = join(',', $row);
}
$output = join('|', $strRows);