Online PHP editor | output for Dcee0

@ 2022-09-28T11:44:58Z

<?php

$a = [
    'a' => 'some value',
    'b' => 'some value',
    'c' => 'some value'
];
$b = [
    'a' => 'another value',
    'd' => 'another value',
    'e' => 'another value',
    'f' => 'another value'
];
$c = [
    'b' => 'some more value',
    'x' => 'some more value',
    'y' => 'some more value',
    'z' => 'some more value'
];

$defaults = array_fill_keys(array_keys($a + $b + $c), '');
$result = ['one' => $a, 'two' => $b, 'three' => $c];
foreach ($result as $k => &$row) {
    $row = array_merge($defaults, $row);
}
var_export($result);

Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14: array ( 'one' => array ( 'a' => 'some value', 'b' => 'some value', 'c' => 'some value', 'd' => '', 'e' => '', 'f' => '', 'x' => '', 'y' => '', 'z' => '', ), 'two' => array ( 'a' => 'another value', 'b' => '', 'c' => '', 'd' => 'another value', 'e' => 'another value', 'f' => 'another value', 'x' => '', 'y' => '', 'z' => '', ), 'three' => array ( 'a' => '', 'b' => 'some more value', 'c' => '', 'd' => '', 'e' => '', 'f' => '', 'x' => 'some more value', 'y' => 'some more value', 'z' => 'some more value', ), )

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