I'm trying to remove all empty strings "" from the kat-array. I tried to do it by using array_filter function like this:
$array = array_filter($array, "strlen");
The problem is that kat[4] is now an object instead of an array.
Any idea how I can remove empty stings from an array without transforming them into an object?
Before
After
Option 1:
$array = array_filter($array, "strlen");
var_dump(json_decode(json_encode($array), true));
Option 2:
<?php
$kat = [
["kat", "1"],
["kat", "1"],
["kat", "1", ""],
["", 'kat', "1.3"],
];
var_dump(array_map('array_filter', $kat));
If filtering introduces key/index jumps/gaps, you can remedy by re-indexing your arrays with array_values() to avoid the objects when encoding the Php arrays to JSON.
If you have 0 indexed sequential keys in your Php arrays they become Javascript arrays when encoding to JSON.
<?php
$data =
[
[
'', 'foo', 'bar'
],
[
'baz', 'bat'
]
];
$filtered =
array_map(
function($v) {
return array_values(
array_filter($v, 'strlen')
);
},
$data
);
var_export($filtered);
$json = json_encode($filtered);
var_dump($json);
Output:
array (
0 =>
array (
0 => 'foo',
1 => 'bar',
),
1 =>
array (
0 => 'baz',
1 => 'bat',
),
)
string(29) "[["foo","bar"],["baz","bat"]]"