how to display PHP Multidimensional Arrays? - php

Question

how to display this using foreach in php?
I want to show it as a list.
$quantity=0;
$quantities = array(
array('Jan',($quantity += $ppmpitem->m1)),
array('Feb',($quantity += $ppmpitem->m2)),
array('Mar',($quantity += $ppmpitem->m3)),
array('Apr',($quantity += $ppmpitem->m4)),
array('May',($quantity += $ppmpitem->m5)),
array('Jun',($quantity += $ppmpitem->m6)),
array('Jul',($quantity += $ppmpitem->m7)),
array('Aug',($quantity += $ppmpitem->m8)),
array('Sep',($quantity += $ppmpitem->m9)),
array('Oct',($quantity += $ppmpitem->m10)),
array('Nov',($quantity += $ppmpitem->m11)),
array('Dec',($quantity += $ppmpitem->m12)),
);
return $quantities;

Answer 1

You have several options, so based on your code (and what I added):
<?php
$quantity=0;
// Added this, so we have an object
$array = [
"m1" => 1,
"m2" => 2,
"m3" => 3,
"m4" => 4,
"m5" => 5,
"m6" => 6,
"m7" => 7,
"m8" => 8,
"m9" => 9,
"m10" => 10,
"m11" => 11,
"m12" => 12
];
// Converted array to object
$ppmpitem = json_decode(json_encode($array));
$quantities = array(
array('Jan',($quantity += $ppmpitem->m1)),
array('Feb',($quantity += $ppmpitem->m2)),
array('Mar',($quantity += $ppmpitem->m3)),
array('Apr',($quantity += $ppmpitem->m4)),
array('May',($quantity += $ppmpitem->m5)),
array('Jun',($quantity += $ppmpitem->m6)),
array('Jul',($quantity += $ppmpitem->m7)),
array('Aug',($quantity += $ppmpitem->m8)),
array('Sep',($quantity += $ppmpitem->m9)),
array('Oct',($quantity += $ppmpitem->m10)),
array('Nov',($quantity += $ppmpitem->m11)),
array('Dec',($quantity += $ppmpitem->m12)),
);
// Pretty print
print("<pre>".print_r($quantities,true)."</pre>");
// As a list where Month is key
foreach($quantities as $key => $value) {
$month = [
$quantities[$key][0] => $quantities[$key][1]
];
$months[$quantities[$key][0]] = $quantities[$key][1];
print_r($month);
}
//Also print full array of months:
print_r($months);
Results are:
Pretty print:
<pre>Array
(
[0] => Array
(
[0] => Jan
[1] => 1
)
[1] => Array
(
[0] => Feb
[1] => 3
)
[2] => Array
(
[0] => Mar
[1] => 6
)
[3] => Array
(
[0] => Apr
[1] => 10
)
[4] => Array
(
[0] => May
[1] => 15
)
[5] => Array
(
[0] => Jun
[1] => 21
)
[6] => Array
(
[0] => Jul
[1] => 28
)
[7] => Array
(
[0] => Aug
[1] => 36
)
[8] => Array
(
[0] => Sep
[1] => 45
)
[9] => Array
(
[0] => Oct
[1] => 55
)
[10] => Array
(
[0] => Nov
[1] => 66
)
[11] => Array
(
[0] => Dec
[1] => 78
)
)
</pre>
Print out "list":
Array
(
[Feb] => 3
)
Array
(
[Mar] => 6
)
Array
(
[Apr] => 10
)
Array
(
[May] => 15
)
Array
(
[Jun] => 21
)
Array
(
[Jul] => 28
)
Array
(
[Aug] => 36
)
Array
(
[Sep] => 45
)
Array
(
[Oct] => 55
)
Array
(
[Nov] => 66
)
Array
(
[Dec] => 78
)
Or print one array (month as key)
Array
(
[Jan] => 1
[Feb] => 3
[Mar] => 6
[Apr] => 10
[May] => 15
[Jun] => 21
[Jul] => 28
[Aug] => 36
[Sep] => 45
[Oct] => 55
[Nov] => 66
[Dec] => 78
)
BR

Answer 2

You may create an array filled from 1 to 12 and apply the array_reduce to get your output.
<?php
class P {
public $m1 = 1;
public $m2 = 1;
public $m3 = 1;
public $m4 = 1;
public $m5 = 1;
public $m6 = 1;
public $m7 = 1;
public $m8 = 1;
public $m9 = 1;
public $m10 = 1;
public $m11 = 1;
public $m12 = 1;
public function __construct() {
}
}
$ppmpitem = new P();
$array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
$quantities = array_reduce($array, function ($carry, $item) use ($ppmpitem) {
$month = DateTime::createFromFormat('!m', $item)->format('M');
$carry['total'] += $ppmpitem->{"m" . $item};
$carry['quantities'][] = [$month, $carry['total']];
return $carry;
}, ['total' => 0, 'quantities' => []])['quantities'];
var_dump($quantities);

Answer 3

There are a number of ways to display a multidimensional array including use of the default PHP's print_r() function. Besides if you want a more precise way of accessing the elements and displaying them you can use a looping criteria such as for() or foreach(). Sample :
foreach($quantities as $qty){
print_r($qty);
}