Basic Array Operations | PHP

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Insert

• Insert at the end. There are 2 ways to do this. I usually use the first.

$array[] = $value; // way 1
array_push($array, $value); // way 2

• Insert at the beginning

array_unshift($array , $value);

• Insert at specific position

$array_splice(
    $array, // array that be inserted
    $insert_index, // int
    $remove_how_many_items_start_from_insert_index, // int
    $inject_array, //[$value1, $value2...]
);

Delete

• Assign NULL doesn’t work

$array = [1, 2, 3, 4];
// Try to remove 3 for example
$array[2] = null;
// result: [1, 2, null, 4]

• Pop out the last item

array_pop($array);// [1,2,3,4] => [1,2,3]

• Unset

unset($array[$index])

Note! this way will leave the index empty, see below