Odstránenie položiek Null v php array - php, arrays

Ako môžem odstrániť null v nasledujúcom poli PHP? Môže mi niekto pomôcť pease?

{
"total": 20,
"memberships": [
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[
""
]
]
}

odpovede:

Stačí použiť array_filter:

array_filter($array)

array_filter uchováva ľubovoľný element hodnotený ako true v poli. Vracia nové pole.

array_filter môže z vášho poľa odstrániť prázdne reťazce, falošné hodnoty a nulové hodnoty:

$entry = array(
0 => "foo",
1 => false,
2 => -1,
3 => null,
4 => ""
);

print_r(array_filter($entry));

bude výstup:

Array
(
[0] => foo
[2] => -1
)

Ďalej môžete definovať vlastný filter a volať array_filter s funkciou spätného volania s požadovaným filtrovaním:

function odd($var)
{
// returns whether the input integer is odd
return($var & 1);
}

function even($var)
{
// returns whether the input integer is even
return(!($var & 1));
}

$array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);
$array2 = array(6, 7, 8, 9, 10, 11, 12);

echo "Odd :n";
print_r(array_filter($array1, "odd"));
echo "Even:n";
print_r(array_filter($array2, "even"));

bude výstup:

Odd :
Array
(
[a] => 1
[c] => 3
[e] => 5
)
Even:
Array
(
[0] => 6
[2] => 8
[4] => 10
[6] => 12
)

Budete musieť hľadať rekurzívne a odstrániť každý prvok. Možno nejaký prístup ako tento (pozornosť - kód som neskúšal a nie som programátor PHP):

function RemoveNull($array)
{
foreach ($array as $key => $value)
{
if (is_array($value))
{
RemoveNull($value);
}

if ($value == null)
{
unset($array[$key]);
}
}
}