Entfernen von Null-Elementen in PHP-Array - PHP, Arrays

Wie kann ich entfernen? null in dem folgenden PHP-Array? Kann mir jemand helfen pease?

{
"total": 20,
"memberships": [
"channel-568e2ec856e52816891757",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-568e2ec856e52816891757",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-568e2ec856e52816891757",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-548a652109b5f855658713",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-5695f8e9a0c56329461106",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-540e028357c11975473911",
"channel-5631e7c4a317d864607733",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-568e2ec856e52816891757",
null,
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null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
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"channel-5631e7c4a317d864607733",
null,
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null,
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null,
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"channel-548a652109b5f855658713",
null,
null,
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null,
null,
null,
null,
null,
null,
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null,
null,
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null,
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"channel-548a652109b5f855658713",
null,
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null,
null,
null,
null,
null,
null,
null,
null,
null,
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"channel-548a652109b5f855658713",
null,
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"channel-568d788e05dcd282842479",
"channel-568e2ec856e52816891757",
null,
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null,
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null,
null,
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null,
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"channel-568e2ec856e52816891757",
null,
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null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-568e2ec856e52816891757",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-5695f8e9a0c56329461106",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
"channel-568e2ec856e52816891757",
"channel-5695f8e9a0c56329461106",
null,
null,
null,
null,
null,
null,
null,
null,
null,
null,
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null,
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null,
[
""
]
]
}

Antworten:

Benutz einfach array_filter:

array_filter($array)

array_filter speichert jedes Element als true im Array. Es wird ein neues Array zurückgegeben.

array_filter kann leere Zeichenfolgen, falsche Werte und Nullen aus Ihrem Array entfernen:

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

print_r(array_filter($entry));

wird ausgegeben:

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

Außerdem können Sie einen eigenen Filter definieren und array_filter mit einer Callback-Funktion mit der gewünschten Filterung aufrufen:

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"));

wird ausgegeben:

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

Sie müssen rekrusiv suchen und jedes Element entfernen. Vielleicht ein Ansatz wie dieser (Achtung - ich habe den Code nicht getestet und bin KEIN PHP-Programmierer):

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

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