I have two arrays:
$array1 = [29, 'a', 'x', 'c', 11];
$array2 = ['a' => 20, 'x' => 21, 'c' => 23];
I want to get an array that looks like:
$array3 = [29, 20, 21, 23, 11];
I know how to do it with a foreach loop, but I was wondering if there was a way to do it as a one liner, or maybe with some sort of anonymous function.
array_map work as well the other answer :
$array1 = [29, 1=>'a', 2=>'x',3=>'c', 11];
$array2 = ['a'=>20, 'x'=>21, 'c'=>23];
$array3 = array_map(function($a) use($array2){return is_int($a) ? $a : $array2[$a];}, $array1);
You can add them and filter out non-numeric values:
$array3 = array_values(array_filter($array1 + $array2, 'is_numeric'));
If the order is important:
$array3 = array_filter(call_user_func_array(
'array_merge', array_map(null, $array1, $array2)),
'is_numeric');
Then array_values if you need to re-index.
In either case, if you want only integers or floats then use is_int or is_float.
An attempt with a one-liner :
$array1 = [29, 1=>'a', 2=>'x',3=>'c', 11];
$array2 = ['a'=>20, 'x'=>21, 'c'=>23];
$array3 = array_values(array_filter(array_merge($array1,$array2),function($i){return is_int($i);}));
print_r($array3);
// Outputs :
/*
Array
(
[0] => 29
[1] => 11
[2] => 20
[3] => 21
[4] => 23
)
*/
I reckon this looks more elegant than the earlier posted solutions...
Code: (Demo)
var_export(
array_map(fn($v) => $array2[$v] ?? $v, $array1)
);
Attempt to access the mapping array's value by key; if there is no matching key, then default to the original value.
If you don't like to use foreach() you can use array_replace() function. You can learn more about this function in below:
array_walk($array1, function(&$value) use ($array2) { $value = isset($array2[$value]) ? $array2[$value] : $value; } );orarray_walk($array1, function(&$value) use ($array2) { $value = $array2[$value] ?? $value; } );for PHP>7.0array_walk($array1, function(&$value) use ($array2) { $value = $array2[$value] ?? $value; } )