使用 unset 从数组中删除创建值

Question

$array = [ 0, 5, 7 ];

For this array, I want to unset without it assigning a value.

When I unset($array[5]) it will return

{
    "0" => 0,
    "1" => 5,
    "2" => 7
}

But my actual goal is to make it return like

[ 0, 7 ]

That way when I use json_encode it will just show up as

[ 
    0,
    7
]

Is this possible at all? I googled and everyone just mentions indexing, but I am looking at just removing this number from the array. Not have it reindex or change the formatting of it to have a value.

Answer 1

The parameter within the brackets on $array[] is actually the numerical index or associative index (arrays in PHP are maps).

In your case, you want to do:

unset($arr[1]);

Answer 2

$a = [0,5,7];
array_splice($a, 1, 1); // remove from position 1 - remove 1 entry

echo json_encode($a);

Working example .

output

[0,7]

references

• array_splice

additional informaion

Unset wont work as is, since it preserves the initial keys.

A solution with unset is to ignore the keys by using array_values :

$a = [0,5,7];

unset($a[1]);
$a = array_values($a);

echo json_encode($a);

Working example .

Same output as above.