Transpose the data from multiple flat arrays to create an indexed array with associative rows

Question

I have a form that is posting 4 arrays that I need to combine and eventually compose to email. The four arrays:

$quantityArray    = $this->input->post('qty');
$dimensionArray   = $this->input->post('dimension');
$thicknessArray   = $this->input->post('thickness');
$descriptionArray = $this->input->post('description');

will all have the same array length and each index will be related. How do I combine the 4 arrays such as

[0]
     'qty' => '1',
     'dimenesion => '2x2',
     'thickness' => '2in',
     'description' => 'this is the description'
[1]
     'qty' => '1',
     'dimenesion => '2x2',
     'thickness' => '2in',
     'description' => 'this is the description'

I have tried array_combine(), array_merge() and can't get the results that I am looking for.

BTW, how do you expect the resulting array ? Both arrays look same. — The Alpha
– The Alpha, Commented Oct 25, 2013 at 18:13

bksi · Accepted Answer · 2013-10-25 18:28:42Z

2

If you have same length for those arrays here is example code:

$resultArray = array();
foreach($quantityArray as $index => $qty) {
    $resultArray[$index]['qty'] = $qty;
    $resultArray[$index]['dimenesion'] = $dimensionArray[$index];
    $resultArray[$index]['thickness'] = $thicknessArray[$index];
    $resultArray[$index]['description'] = $descriptionArray [$index];
}

print_r($resultArray);

answered Oct 25, 2013 at 18:28

bksi

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jacouh · Accepted Answer · 2013-10-25 18:42:35Z

1

This also may work:

<?php
//...
$quantityArray    = $this->input->post('qty');
$dimensionArray   = $this->input->post('dimension');
$thicknessArray   = $this->input->post('thickness');
$descriptionArray = $this->input->post('description');

//
// combine them:
//
$combined = array();
$n = count($quantityArray);
for($i = 0; $i < $n; $i++)
{
  $combined[] = array(
    'qty' => $quantityArray[$i],
    'dimenesion' => $dimensionArray[$i],
    'thickness' => $thicknessArray[$i],
    'description' => $descriptionArray[$i]
  );
}
//
echo "<pre>";
print_r($combined);
echo "</pre>";
?>

edited Oct 25, 2013 at 18:42

answered Oct 25, 2013 at 18:33

jacouh

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Comments

AMH · Accepted Answer · 2013-10-25 19:04:38Z

1

If we assume that we have same length for those arrays here is my codes:

$quantityArray = array(1, 1, 5, 3);
$dimensionArray = array("2x2", "3x3", "4x4", "2x2");
$thicknessArray = array("2in", "3in", "4in", "2in");
$descriptionArray = array("this is the description 1", "this is the description 2 ", "this is the description3 ", "this is the description4" );

$myCombinArray = array();
foreach ( $quantityArray as $idx => $val ) {
    $subArray = array (
            'qty' => $quantityArray [$idx],
            'dimenesion' => $dimensionArray [$idx],
            'thickness' => $thicknessArray [$idx],
            'description' => $descriptionArray [$idx] 
    );
    array_push ( $myCombinArray, $subArray );
}
print_r($myCombinArray);

edited Oct 25, 2013 at 19:04

answered Oct 25, 2013 at 18:56

AMH

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Comments

kelunik · Accepted Answer · 2013-10-25 18:28:52Z

0

How about an easy way if there are always those 4 arrays:

$quantityArray    = $this->input->post('qty');
$dimensionArray   = $this->input->post('dimension');
$thicknessArray   = $this->input->post('thickness');
$descriptionArray = $this->input->post('description');

$combinedArray = [$quantityArray, $dimensionArray, $thicknessArray, $descriptionArray];

# old syntax:
# $combinedArray = array($quantityArray, $dimensionArray, $thicknessArray, $descriptionArray);

answered Oct 25, 2013 at 18:28

kelunik

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Comments

mickmackusa · Accepted Answer · 2025-01-16 07:10:54Z

0

Assuming that all arrays will have the same length, your data transposition and pre-defined associative rows can be concisely implemented using array_map() and get_defined_vars(). Demo

var_export(
    array_map(
        fn($qty, $dimension, $thickness, $description) => get_defined_vars(),
        $this->input->post('qty'),
        $this->input->post('dimension'),
        $this->input->post('thickness'),
        $this->input->post('description')
    )
);

answered Jan 16 at 7:10

mickmackusa♦

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