如何将4个多维数组组合成1个多维

Question

I unload 4 different tables from MySQL with different keys. I need to combine them into one array. I'll sort them by date (but it's not important and I know how to do it).

As I see it:

foreach ($rows2 as $msgs2) { 
 $arraynew = array_merge($arraynew, array('cost' => $msgs2['vivod'], 'date' => $msgs2['date'], 'type' => '1'));
}

foreach ($rows3 as $msgs3) { 
 $arraynew = array_merge($arraynew, array('cost' => $msgs3['price'], 'date' => $msgs3['data'], 'type' => '2'));
}

foreach ($rows4 as $msgs4) { 
 $arraynew = array_merge($arraynew, array('cost' => $msgs4['price'], 'date' => $msgs4['data'], 'type' => '3'));
}

foreach ($rows5 as $msgs5) { 
  $arraynew = array_merge($arraynew, array('cost' => $msgs5['cost'], 'date' => $msgs5['data'], 'type' => '4'));
}

But it does not work.

Answer 1

What you are looking for is array_merge_recursive ,

<?php
$ar1 = array("color" => array("favorite" => "red"), 5);
$ar2 = array(10, "color" => array("favorite" => "green", "blue"));
$result = array_merge_recursive($ar1, $ar2);
print_r($result);
?>

Output

Array
(
    [color] => Array
        (
            [favorite] => Array
                (
                    [0] => red
                    [1] => green
                )

            [0] => blue
        )

    [0] => 5
    [1] => 10
)

Answer 2

use array_reduce($array, 'array_merge', array()) .

Example:

$a = array(array(1, 2, 3), array(4, 5, 6),array(7, 8, 9),array(10, 11, 12));
$result = array_reduce($a, 'array_merge', array());`

Answer 3

<?php

$foos = [
    ['vivod' => '11', 'date' => '20140112'],
    ['vivod' => '23', 'date' => '20140113']
];
$bars = [
    ['price' => '29', 'date' => '20171201'],
    ['price' => '31', 'date' => '20170102']
];

$result = array();

foreach ($foos as $foo) { 
    $result[] = array('cost' => $foo['vivod'], 'date' => $foo['date'], 'type' => '1');
}

foreach ($bars as $bar) { 
    $result[] = array('cost' => $bar['price'], 'date' => $bar['date'], 'type' => '2');
}

var_export($result);

Output:

array (
  0 => 
  array (
    'cost' => '11',
    'date' => '20140112',
    'type' => '1',
  ),
  1 => 
  array (
    'cost' => '23',
    'date' => '20140113',
    'type' => '1',
  ),
  2 => 
  array (
    'cost' => '29',
    'date' => '20171201',
    'type' => '2',
  ),
  3 => 
  array (
    'cost' => '31',
    'date' => '20170102',
    'type' => '2',
  ),
)